vp9_loop_filter_alloc: reorder parameters

VP9LfSync lf_sync is being operated on, make it the first parameter as
in dealloc

Change-Id: Id3cdf6b6a48157627780ae0d5d4b7dfa94a78078

vp9/decoder/vp9_dthread.c

@@ -149,7 +149,7 @@ void vp9_loop_filter_frame_mt(YV12_BUFFER_CONFIG *frame,
   // This always needs to be done even if frame_filter_level is 0.
   if (!lf_sync->sync_range || cm->last_height != cm->height) {
     vp9_loop_filter_dealloc(lf_sync);
-    vp9_loop_filter_alloc(cm, lf_sync, sb_rows, cm->width);
+    vp9_loop_filter_alloc(lf_sync, cm, sb_rows, cm->width);
   }
 
   if (!frame_filter_level) return;
@@ -216,7 +216,7 @@ static int get_sync_range(int width) {
 }
 
 // Allocate memory for lf row synchronization
-void vp9_loop_filter_alloc(VP9_COMMON *cm, VP9LfSync *lf_sync, int rows,
+void vp9_loop_filter_alloc(VP9LfSync *lf_sync, VP9_COMMON *cm, int rows,
                            int width) {
   lf_sync->rows = rows;
 #if CONFIG_MULTITHREAD

vp9/decoder/vp9_dthread.h

@@ -42,8 +42,8 @@ typedef struct VP9LfSyncData {
 } VP9LfSync;
 
 // Allocate memory for loopfilter row synchronization.
-void vp9_loop_filter_alloc(struct VP9Common *cm, VP9LfSync *lf_sync,
-                           int rows, int width);
+void vp9_loop_filter_alloc(VP9LfSync *lf_sync, VP9_COMMON *cm, int rows,
+                           int width);
 
 // Deallocate loopfilter synchronization related mutex and data.
 void vp9_loop_filter_dealloc(VP9LfSync *lf_sync);