The __this_cpu_ptr macro is no longer in use so drop it.

Signed-off-by: Christoph Lameter <cl@linux.com>

Index: linux/include/linux/percpu.h
===================================================================
--- linux.orig/include/linux/percpu.h	2013-12-03 15:52:58.758524804 -0600
+++ linux/include/linux/percpu.h	2013-12-03 15:52:58.758524804 -0600
@@ -139,9 +139,6 @@ extern int __init pcpu_page_first_chunk(
 				pcpu_fc_populate_pte_fn_t populate_pte_fn);
 #endif
 
-/* Keep until we have removed all uses of __this_cpu_ptr */
-#define __this_cpu_ptr raw_cpu_ptr
-
 /*
  * Use this to get to a cpu's version of the per-cpu object
  * dynamically allocated. Non-atomic access to the current CPU's