common_audio: Replaced invalid operand in min_max_operations_neon.S"

Vector Move immediate can not load #0x7FFF. Changed to us vdup from already loaded register.

BUG=N/A
TESTED=ios and android trybots
R=kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/26879004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7477 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/common_audio/signal_processing/min_max_operations_neon.S b/webrtc/common_audio/signal_processing/min_max_operations_neon.S
index c84307f..f427e68 100644
--- a/webrtc/common_audio/signal_processing/min_max_operations_neon.S
+++ b/webrtc/common_audio/signal_processing/min_max_operations_neon.S
@@ -209,7 +209,7 @@
   cmp r1, #0
   ble END_MIN_VALUE_W16
 
-  vmov.i16 q12, #0x7FFF
+  vdup.16 q12, r2
   cmp r1, #8
   blt LOOP_MIN_VALUE_W16