build(s32g274a): add build configs for s32g274ardb2

Add build configuration for S32G274ARDB2 platform to
tf-l2-coverity-misra-nominated build group and include it in
coverity makefile.

Change-Id: Ib475f56b0b6f3f454c631a589ffccf41476b47e6
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
5 files changed