[PARISC] convert to use CONFIG_64BIT instead of __LP64__

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
diff --git a/include/asm-parisc/mmzone.h b/include/asm-parisc/mmzone.h
index c878136..9608d2c 100644
--- a/include/asm-parisc/mmzone.h
+++ b/include/asm-parisc/mmzone.h
@@ -35,7 +35,7 @@
 #define PFNNID_MAP_MAX  512     /* support 512GB */
 extern unsigned char pfnnid_map[PFNNID_MAP_MAX];
 
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
 #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT))
 #else
 /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */