Two different documents for DM355 mention different addresses for the same register.
In "Video Processing Back End Reference Guide", page 49 (section 3.1.1.4) the address for VPSS_CLK_CTRL is said to be "0x01C70004".
In "ARM Subsystem User's Guide", on page 122 (section 9.10, System control registers) the offset for VPSS_CLK_CTRL is 0x44. According to Table 4-2 (ARM Configuration Bus Access to Peripherals) the address for that register should be 0x01C4:0000 + 0x44, which makes it 0x01C4:0044.
Is that an error in VPBE Guide?