[PATCH] sh64: defconfig updates

Update for the cayman defconfig.  We also drop the generic arch/sh64/defconfig
as it has very little hope of being kept up to date, so we use the cayman one
instead.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>