avr32: cleanup - use _AC macro to define PAGE_SIZE

PAGE_SIZE is used both from assembly and C code. We want to have type
specifiers when using it from C, but this will make the assembler
confused, so we need to make it conditional.

This is exactly what the _AC macro is for, so using it allows us to
get rid of a few lines of cpp noise.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

include/asm-avr32/page.h

@@ -8,13 +8,11 @@
 #ifndef __ASM_AVR32_PAGE_H
 #define __ASM_AVR32_PAGE_H
 
+#include <linux/const.h>
+
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT	12
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE	(1 << PAGE_SHIFT)
-#else
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#endif
+#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
 #define PAGE_MASK	(~(PAGE_SIZE-1))
 #define PTE_MASK	PAGE_MASK