[REGRESSION] PAGE_ALIGN(): correctly handle ... breaks AVR32 build

[Ben Nizette <bn@niasdigital.com>]

As of

commit 27ac792ca0b0a1e7e65f20342260650516c95864
Author: Andrea Righi <righi.andrea@gmail.com>
Date:   Wed Jul 23 21:28:13 2008 -0700

    PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures

We no longer have PAGE_ALIGN in asm-avr32/page.h so the AVR32 build dies
quite quickly:

  CC      init/main.o
In file included from include/linux/utsname.h:35,
                 from init/main.c:20:
include/linux/sched.h: In function 'arch_pick_mmap_layout':
include/linux/sched.h:2149: error: implicit declaration of function 'PAGE_ALIGN'
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2

This looks a relatively simple fix, just include linux/mm.h from
asm-avr32/processor.h from where sched.h gets the dodgy macro.
Unfortunately this, and every other placement of an #include
<linux/mm.h> I've tried, ends up in Massive Include Armageddon as per
[1].

Ideas?

Thanks,
	--Ben.

[1] http://niasdigital.com/bnizette/logs/MIA-25-7-8.log