asm-generic/tlb.h: build fix

bring back the avr32, blackfin, sh, sparc architectures into working order,
by reverting the effects of this change that came in via the x86 tree:

   commit a5a19c63
   Author: Jeremy Fitzhardinge <jeremy@goop.org>
   Date:   Wed Jan 30 13:33:39 2008 +0100

       x86: demacro asm-x86/pgalloc_32.h

Sorry about that!
Signed-off-by: NIngo Molnar <mingo@elte.hu>

include/asm-generic/tlb.h

@@ -15,6 +15,7 @@
 
 #include <linux/swap.h>
 #include <linux/quicklist.h>
+#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
 /*

include/linux/swap.h

@@ -6,7 +6,6 @@
 #include <linux/mmzone.h>
 #include <linux/list.h>
 #include <linux/sched.h>
-#include <linux/pagemap.h>
 
 #include <asm/atomic.h>
 #include <asm/page.h>