ARM: Change dmb domain for bionic_atomic_barrier()

This patch changes the domain that the memory barrier operates on. Assumes
that the scope of bionic_atomic_barrier() does not include device memory,
memory shared with the GPU or any other memory external to the processor
cluster.

Change-Id: I291e741c98a64c86f3a3cf99811bbf1e714ac9aa
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
diff --git a/libc/private/bionic_atomic_inline.h b/libc/private/bionic_atomic_inline.h
index 2bb1128..c887e5a 100644
--- a/libc/private/bionic_atomic_inline.h
+++ b/libc/private/bionic_atomic_inline.h
@@ -25,7 +25,7 @@
  *
  * Macros defined in this header:
  *
- * void ANDROID_MEMBAR_FULL(void)
+ * void ANDROID_MEMBAR_FULL()
  *   Full memory barrier.  Provides a compiler reordering barrier, and
  *   on SMP systems emits an appropriate instruction.
  */