TF-A: Fix BL2 bug in dynamic configuration initialisation
TF-A: Fix BL2 bug in dynamic configuration initialisation

This patch fixes the bug in BL2 dynamic configuration initialisation
which prevents loading NT_FW_CONFIG image (ref. GENFW-3471).
It also adds parentheses around 'if' statement conditions to fix
Coverity defect.

Change-Id: I353566c29b84341887e13bf8098a4fedfc4e00ff
Signed-off-by: Alexei Fedorov <c822f9d283009ea22aff7123d9d948b6c6849e25@arm.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware