compiler-intel.h: Remove duplicate definition

barrier is already defined as __memory_barrier in compiler.h
Remove this unnecessary redefinition.
Signed-off-by: NPranith Kumar <bobby.prani@gmail.com>
Link: http://lkml.kernel.org/r/CAJhHMCAnYPy0%2BqD-1KBnJPLt3XgAjdR12j%2BySSnPgmZcpbE7HQ@mail.gmail.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>

include/linux/compiler-intel.h

@@ -13,12 +13,9 @@
 /* Intel ECC compiler doesn't support gcc specific asm stmts.
  * It uses intrinsics to do the equivalent things.
  */
-#undef barrier
 #undef RELOC_HIDE
 #undef OPTIMIZER_HIDE_VAR
 
-#define barrier() __memory_barrier()
-
 #define RELOC_HIDE(ptr, off)					\
   ({ unsigned long __ptr;					\
      __ptr = (unsigned long) (ptr);				\