Add SPI board support for Zoom OMAP-L138 Experimenter Kit

I need to add the following structure to arch/arm/mach-omap2/board-xxx.c:

static struct spi_board_info omapl138_spi_board_info[] __initdata = {
 {
 .modalias = "spidev",
 .bus_num = 2,
 .chip_select = 0,
 .max_speed_hz = 1500000,
 }
};

I use dvsdk_omapl138-evm_04_03_00_06 with linux-2.6.37-psp03.21.00.04.sdk

There are next board-files in linux-2.6.37-psp03.21.00.04.sdk/arch/arm/mach-omap2

board-2430sdp.c board-flash.c board-omap3evm.c board-rx51-sdram.c
board-3430sdp.c board-flash.h board-omap3logic.c board-rx51-video.c
board-3630sdp.c board-generic.c board-omap3pandora.c board-zoom2.c
board-4430sdp.c board-h4.c board-omap3stalker.c board-zoom3.c
board-am3517evm.c board-igep0020.c board-omap3touchbook.c board-zoom-debugboard.c
board-apollon.c board-igep0030.c board-omap4panda.c board-zoom-peripherals.c
board-cm-t3517.c board-ldp.c board-overo.c
board-cm-t35.c board-n8x0.c board-rx51.c
board-devkit8000.c board-omap3beagle.c board-rx51-peripherals.c

There are ".chip_select" strings in next files: 

board-3430sdp.c
board-4430sdp.c
board-cm-t35.c
board-cm-t35.c
board-devkit8000.c
board-ldp.c
board-n8x0.c
board-omap3evm.c
board-omap3pandora.c
board-omap3pandora.c
board-omap3stalker.c
board-omap3touchbook.c
board-overo.c
board-rx51-peripherals.c
board-rx51-peripherals.c
board-rx51-peripherals.c

So I stuck which one of them should I to modify?

Thank you for any help !