tf-coverity: add MHUv3 build coverage

Add a TC build that uses MHUv3 instead of MHUv2 when communicating with
RSE. This enables coverage of mhu_v3_x.c and mhu_wrapper_v3_x.c before
main platforms that uses MHUv3 are available.

Change-Id: I141376d76eda0788a999f029136a45287d2003d2
Signed-off-by: Joel Goddard <joel.goddard@arm.com>
1 file changed