Enable mmx loop filter routines

The mmx routines work as expected for the loop filter, so enable them.

Change-Id: I2bbd9b99a4445fcba17bb95002f1fb6e01fe8f85

vp9/common/vp9_rtcd_defs.sh

diff --git a/vp9/common/vp9_rtcd_defs.sh b/vp9/common/vp9_rtcd_defs.sh
index f281e08..74d3ab5 100644
--- a/vp9/common/vp9_rtcd_defs.sh
+++ b/vp9/common/vp9_rtcd_defs.sh
@@ -93,7 +93,7 @@
 specialize vp9_mbloop_filter_vertical_edge
 
 prototype void vp9_loop_filter_vertical_edge "uint8_t *s, int pitch, const uint8_t *blimit, const uint8_t *limit, const uint8_t *thresh, int count"
-specialize vp9_loop_filter_vertical_edge
+specialize vp9_loop_filter_vertical_edge mmx
 
 prototype void vp9_mb_lpf_horizontal_edge_w "uint8_t *s, int pitch, const uint8_t *blimit, const uint8_t *limit, const uint8_t *thresh, int count"
 specialize vp9_mb_lpf_horizontal_edge_w
@@ -102,7 +102,7 @@
 specialize vp9_mbloop_filter_horizontal_edge
 
 prototype void vp9_loop_filter_horizontal_edge "uint8_t *s, int pitch, const uint8_t *blimit, const uint8_t *limit, const uint8_t *thresh, int count"
-specialize vp9_loop_filter_horizontal_edge
+specialize vp9_loop_filter_horizontal_edge mmx
 
 #
 # post proc