[U-Boot] omap3 and get_board_rev

Hi all,

In current omap3 implementation get_board_rev function is defined in cpu/arm_cortexa8/omap3/sys_info.c. The function returns some magic constant and that's it. I wonder what would be the best way to fix it: either make the get_board_rev in cpu/arm_cortexa8/omap3/sys_info.c "weak", or copy it to all supported omap3 boards?