Fix rc.sysinit patching on 6.6

rc.sysinit changed a bit. Make the patch apply cleanly.

Change-Id: I6738243cd637e8595712fc84861532b175a29555
Signed-off-by: Ryan Barry <rbarry@redhat.com>
Stop trying to patch mkdumprd on 6.6 and above

mkdumprd is better about detecting which devices are bridges, and
we don't need to patch it

Change-Id: Icced44728b59395299c643dbdf69fb114e530bbb
Signed-off-by: Ryan Barry <rbarry@redhat.com>