In j721s2_evm_a72_defconfig:
CONFIG_CMD_PCI=y
CONFIG_PCIE_CDNS_TI=y
CONFIG_PCI=y
CONFIG_NVME=y
CONFIG_NVME_PCI=y
CONFIG_CMD_NVME=y

In U-Boot:
=> pci enum
pcie_cdns_ti pcie@2910000: link up
=> nvme scan
=> nvme info
Device 0: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 1: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 2: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 3: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 4: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 5: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 6: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 7: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 8: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 9: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 10: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 11: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 12: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 13: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 14: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 15: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 16: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 17: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 18: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 19: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 20: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 21: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 22: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 23: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 24: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 25: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 26: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 27: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 28: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 29: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 30: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Device 31: Vendor: 0x2646 Rev: CRTP2324 Prod: 50026B7686ABE27C
            Type: Hard Disk
            Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
=>