Pass plane into get_conv_params###

This CL allows us to use different interpolation filters for
YUV planes.

Change-Id: I9446d43ae2be5a9a48b8a4cb6efcac43df6196d5
diff --git a/test/av1_convolve_optimz_test.cc b/test/av1_convolve_optimz_test.cc
index 586846f..a4bb7e7 100644
--- a/test/av1_convolve_optimz_test.cc
+++ b/test/av1_convolve_optimz_test.cc
@@ -73,7 +73,8 @@
     filter_ = GET_PARAM(4);
     subpel_ = GET_PARAM(5);
     int ref = GET_PARAM(6);
-    conv_params_ = get_conv_params(ref);
+    const int plane = 0;
+    conv_params_ = get_conv_params(ref, plane);
 
     alloc_ = new uint8_t[maxBlockSize * 4];
     src_ = alloc_ + (vertiOffset * maxWidth);