Fix mv clamping when superres is used

BUG=aomedia:862

Change-Id: Ide71432cb85858362360e3c4ae8404f75ff9ba03

av1/common/reconinter.h

diff --git a/av1/common/reconinter.h b/av1/common/reconinter.h
index 0c33333..b5af38d 100644
--- a/av1/common/reconinter.h
+++ b/av1/common/reconinter.h
@@ -28,6 +28,9 @@
 #define WARP_GM_NEIGHBORS_WITH_OBMC 0
 #endif  // CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
 
+#define AOM_LEFT_TOP_MARGIN_SCALED \
+  ((AOM_BORDER_IN_PIXELS - AOM_INTERP_EXTEND) << SCALE_SUBPEL_BITS)
+
 #ifdef __cplusplus
 extern "C" {
 #endif