fix(spm): reduce verbosity on passing tf-a-tests

Reduce info messages verbosity for RME test cases:

INFO:    Sip Call - Protect memory
INFO:    Sip Call - Unprotect memory
INFO:    Sip Call - Protect memory
INFO:    Sip Call - Unprotect memory

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I0bdb545bc6576110dd740ecda8130618f51ed710
1 file changed