This patch cleans up needless includes of asm/pgalloc.h from the drivers/
subtree.  drivers/char/mem.c has been compile tested; the others have not,
since they are for non-x86 and non-ARM architectures.

This patch is part of a larger patch aiming towards getting the include of
asm/pgtable.h out of linux/mm.h, so that asm/pgtable.h can sanely get at
things like mm_struct and friends.

I suggest testing in -mm for a while to ensure there aren't any hidden arch
issues.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>