Switch unaligned access to the packed-struct implementation for BE accesses as
this reduces the size of the kernel a little.  LE still uses the byte shift.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>