coverity: stop ignoring RSS and MHU driver files

Thanks to the (artificial) PLAT_RSS_NOT_SUPPORTED=0 build condig added
in commit e30bd0c9ac07f "coverity: add coverage for RSS driver", these
files are now getting analysed through Coverity.

Change-Id: If7ae0ea1ffa9cb643bf1d33955a71a5469386555
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
1 file changed