[IA64] move fnptr definition inside #ifdef __KERNEL__

Linus pointed out that this definition should not be
exported to user space.
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/include/asm/types.h

@@ -30,16 +30,16 @@
 
 typedef unsigned int umode_t;
 
-struct fnptr {
-	unsigned long ip;
-	unsigned long gp;
-};
-
 /*
  * These aren't exported outside the kernel to avoid name space clashes
  */
 # ifdef __KERNEL__
 
+struct fnptr {
+	unsigned long ip;
+	unsigned long gp;
+};
+
 /* DMA addresses are 64-bits wide, in general.  */
 typedef u64 dma_addr_t;