[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/system.h b/include/asm-parisc/system.h
index 74f037a..7e9afa7 100644
--- a/include/asm-parisc/system.h
+++ b/include/asm-parisc/system.h
@@ -34,7 +34,7 @@
 	unsigned int i:1;
 };
 
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
 #define pa_psw(task) ((struct pa_psw *) ((char *) (task) + TASK_PT_PSW + 4))
 #else
 #define pa_psw(task) ((struct pa_psw *) ((char *) (task) + TASK_PT_PSW))