build(bl2): enable check for bl2 base overflow assert

Currently, the BL2 base overflow check asserts for all cases,
but this check is only necessary if not reset to BL2 case.
Therefore, adding a condition for this check.

Signed-off-by: Divin Raj <divin.raj@arm.com>
Change-Id: Ia129921d76bcd32058ea0767db0319e6724be8ab
1 file changed