x86/mrst: Add additional debug prints for pb_keys

Added additional debug output that we always seem to add
during power ons to validate firmware operation.

Signed-off-by: Michael Demeter <michael.demeter@intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/20111215223116.10166.50803.stgit@bob.linux.org.uk
[ fixed line breaks, formatting and commit title. ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>