kern/dl: Print module name on license check failure

kern/dl: Print module name on license check failure

Prior to this change, the GRUB would only indicate that the check had
been failed, but not by what module. This made it difficult to track
down either the problem module, or debug the false positive further.

Before performing the license check, resolve the module name so that
it can be printed if the license check fails.

Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>