refactor: print error codes and func ID

Function helpers from the spm_common.c have been refactored,
to print the FF-A func and error names.

This changes adds the respective hex integer return to the
logs as well.

Useful when the *_name functions print "unknown".

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I375a1e09820e1d4c9fc1a37f8f3626d39a4b62ae
1 file changed