[PATCH] powerpc: rename mpc85xx.c to misc.c

Rename mpc85xx.c to misc.c to match the pattern established by the
8349 port - consistency is a good thing.  Also run Lindent on the
file to clean it up.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>