fix(intel): update mailbox SDM printout message

The printout message is misleading.
Update the message content and mask out the return code.

Change-Id: I08acb73894f8504b2773a19dbb10b42a65fcda5d
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
1 file changed