This change switches matroxfb on x86 and x86_64 from dereferencing
pointers to {read,write}[bwl], as __pa() are gone from them, and so gcc
does not need an additional register for preserving address between
consecutive {read,write}[bwl].

Then it switches only supported architecture left (ppc/ppc64/arm) from
dereferencing pointers to __raw_{read,write}[bwl]. 

Third part is fixing sparse complaints: add __iomem here and there, and
switch one 1bit bitfield from int to unsigned int. 

After this there should be no sparse complaints in matroxfb.
Signed-off-by: Petr Vandrovec <vandrove@vc.cvut.cz>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>