vp9_denoiser: mark total_adj_strong_thresh inline

avoids -Wunused-function warnings when INLINE is set

Change-Id: I14a3b32837d358516b7702a2fb804bec010bb5c6

vp9/encoder/vp9_denoiser.h

@@ -75,7 +75,8 @@ int vp9_denoiser_alloc(VP9_DENOISER *denoiser, int width, int height,
 // This function is used by both c and sse2 denoiser implementations.
 // Define it as a static function within the scope where vp9_denoiser.h
 // is referenced.
-static int total_adj_strong_thresh(BLOCK_SIZE bs, int increase_denoising) {
+static INLINE int total_adj_strong_thresh(BLOCK_SIZE bs,
+                                          int increase_denoising) {
   return (1 << num_pels_log2_lookup[bs]) * (increase_denoising ? 3 : 2);
 }
 #endif