Disable IBM405_ERR77 and IBM405_ERR51 errata workarounds for 405EP.  This
chip has these problems fixed.
Signed-off-by: NEugene Surovegin <ebs@ebshome.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>