This patch adds proper __iomem annotations to the remaning IO macros on
ppc64, and removes now useless casts from eeh.h. This fixes the sparse
warnings in mpic.c among others.

I need to do an equivalent things for ppc32 (though I think viro did
some of it already) and fix users.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>