[RFC][PATCHES] asm/unaligned.h removal

[Al Viro <viro@zeniv.linux.org.uk>]

	There are only two instances of asm/unaligned.h in the tree -
arc and parisc.  Everything else picks it from asm-generic/unaligned.h
and if not these two, we could just move asm-generic/unaligned.h into
include/linux/unaligned.h and do a tree-wide search-and-replace that
would kill the largest class of asm/*.h includes in the entire kernel.

	Turns out, arc and parisc asm/unaligned.h are very close to
being straight #include <asm-generic/unaligned.h> themselves.  The
following series massages them away.

	It can be found in
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #work.headers.unaligned
Three commits - dealing with parisc, dealing with arc and autogenerated
search-and-replace job (that would obviously be better off done by
Linus at the next -rc1).

	Individual patches in followups (the last one - just the commit
message with script for reproducing the damn thing; the diff itself is
just under 12K lines, <asm/unaligned.h> being the most widely include
asm/*.h in the entire tree).

	Please, review.  I don't really care which tree(s) does that stuff
go through; I can put the first two in my #for-next, as long as nobody
has objections to the patches themselves.