gralloc: Change loglevel of adreno_utils warning

 * The old version of libadreno_utils is still compatible with
   this code, so don't demolish the logs over it.

Change-Id: I089f46265eebb51f6abdad23057acd318e613a8e
diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index cc69e85..066a1fe 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -156,7 +156,7 @@
                 aligned_w = LINK_adreno_compute_padding(width, bpp,
                                      surface_tile_height, raster_mode,
                                      padding_threshold);
-                ALOGW("%s: Warning!! Old GFX API is used to calculate stride",
+                ALOGV("%s: Warning!! Old GFX API is used to calculate stride",
                                                             __FUNCTION__);
             } else {
                 ALOGW("%s: Warning!! Symbols compute_surface_padding and " \