[PATCH] autofs fix for x86-64

Minor patch for the x86-64 32bit emulation. Originally proposed by hpa and it
makes autofs 32bit/64bit clean for x86-64

include/linux/auto_fs.h

@@ -45,7 +45,7 @@
  * If so, 32-bit user-space code should be backwards compatible.
  */
 
-#if defined(__sparc__) || defined(__mips__)
+#if defined(__sparc__) || defined(__mips__) || defined(__x86_64__)
 typedef unsigned int autofs_wqt_t;
 #else
 typedef unsigned long autofs_wqt_t;