fix(intel): update outdated code for Linux direct boot

1. Update emif rsthdshk  macro
2. Update mailbox return status
3. Update bridge return status

Change-Id: I33905508aceb258ac8759c10079b2af977df0e0a
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
5 files changed