s/INTERP_FILTER/InterpFilter/

this matches style guidelines and stabilizes successive runs of
clang-format across the tree. remaining types should be address in
successive commits.

Change-Id: I6ad3f69cf0a22cb9a9b895b272195f891f71170f
diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 8d3202c..6e52c79 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -2108,7 +2108,7 @@
   }
 }
 
-static INTERP_FILTER read_interp_filter(struct aom_read_bit_buffer *rb) {
+static InterpFilter read_interp_filter(struct aom_read_bit_buffer *rb) {
   return aom_rb_read_bit(rb) ? SWITCHABLE
                              : aom_rb_read_literal(rb, 2 + CONFIG_EXT_INTERP);
 }
diff --git a/av1/decoder/decodemv.c b/av1/decoder/decodemv.c
index 535c5b5..290f6c1 100644
--- a/av1/decoder/decodemv.c
+++ b/av1/decoder/decodemv.c
@@ -862,12 +862,12 @@
 }
 #endif  // CONFIG_OBMC || CONFIG_WARPED_MOTION
 
-static INLINE INTERP_FILTER read_interp_filter(AV1_COMMON *const cm,
-                                               MACROBLOCKD *const xd,
+static INLINE InterpFilter read_interp_filter(AV1_COMMON *const cm,
+                                              MACROBLOCKD *const xd,
 #if CONFIG_DUAL_FILTER
-                                               int dir,
+                                              int dir,
 #endif
-                                               aom_reader *r) {
+                                              aom_reader *r) {
 #if CONFIG_EXT_INTERP
   if (!av1_is_interp_needed(xd)) return EIGHTTAP_REGULAR;
 #endif
@@ -880,7 +880,7 @@
     const int ctx = av1_get_pred_context_switchable_interp(xd);
 #endif
     FRAME_COUNTS *counts = xd->counts;
-    const INTERP_FILTER type = (INTERP_FILTER)aom_read_tree(
+    const InterpFilter type = (InterpFilter)aom_read_tree(
         r, av1_switchable_interp_tree, cm->fc->switchable_interp_prob[ctx]);
     if (counts) ++counts->switchable_interp[ctx][type];
     return type;