build: forbid `ENABLE_RME=1` when `SEPARATE_CODE_AND_RODATA=0`

This change mitigates against read-only data being used for malicious
execution on platforms utilizing the RME/CCA.

Change-Id: I0068535aeaa5d2515c7c54ee0dc19200c7a86ba5
Signed-off-by: Chris Kay <chris.kay@arm.com>
1 file changed