board: beagle: beagleplay: enable OF_SYSTEM_SETUP

board: beagle: beagleplay: enable OF_SYSTEM_SETUP

Unfortunately when enabling FDT fixups for the AM62x family of SoCs and
moving TF-A to the bottom of RAM we missed the BeaglePlay. This is
causing Linux's memory allocator to clobber TF-A and break its boot.

Enable OF_SYSTEM_SETUP to fixup the kernel's FDT to inform it of the
actual location of the firmware

CC: Andrew Davis <[email protected]>
CC: Nishanth Menon <[email protected]>
CC: Robert Nelson <[email protected]>
Reported-by: Dhruva Gole <[email protected]>
Signed-off-by: Bryan Brattlof <[email protected]>
Acked-by: Andrew Davis <[email protected]>
Tested-by: Robert Nelson <[email protected]>
Reviewed-by: Nishanth Menon <[email protected]>
Acked-by: Chirag Shilwant <[email protected]>
Tested-by: Dhruva Gole <[email protected]>