[S390] s390: use PAGE_SIZE in vmlinux.lds

Replace the hardcoded 4096 value with the PAGE_SIZE macro.
Converted a few decimal numbers to readable hex numbers.

Use of PAGE_SIZE required a small change to page.h
to allow PAGE_SIZE to be used from assembler/linker scripts.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index f326451..ceec382 100644
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -9,11 +9,12 @@
 #ifndef _S390_PAGE_H
 #define _S390_PAGE_H
 
+#include <linux/const.h>
 #include <asm/types.h>
 
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT      12
-#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
 #define PAGE_MASK       (~(PAGE_SIZE-1))
 #define PAGE_DEFAULT_ACC	0
 #define PAGE_DEFAULT_KEY	(PAGE_DEFAULT_ACC << 4)