configs: j721x_evm: Remove unneeded check for SYS_K3_SPL_ATF

The TARGET_x_R5_EVM check is already enough to limit these defines to
only the correct builds. Remove the extra outer check.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
2 files changed