asm/page.h seems to be the accepted place to declare virt_to_page() on a vast
majority of architectures.  This patch makes sure that a few files which use
that function also directly include the header.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>