Make image parameter of cb_check_image const

Change-Id: I811b3d6f1710154e055b03d5f27b1a8d9b3c0a43
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/17943
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2 files changed