Disable the adaptive quantization when large_scale_tile = 1

Disabled the adaptive quantization(aq_mode=0) when large_scale_tile = 1.

Change-Id: I0dad404ec4df3d0d16f7e8b0a8e9ddd3fc88d470

av1/av1_cx_iface.c

diff --git a/av1/av1_cx_iface.c b/av1/av1_cx_iface.c
index 7f86ced..c5a71b5 100644
--- a/av1/av1_cx_iface.c
+++ b/av1/av1_cx_iface.c
@@ -314,6 +314,13 @@
   }
 #endif  // CONFIG_EXT_TILE
 
+#if CONFIG_EXT_TILE
+  if (cfg->large_scale_tile && extra_cfg->aq_mode)
+    ERROR(
+        "Adaptive quantization are not supported in large scale tile "
+        "coding.");
+#endif  // CONFIG_EXT_TILE
+
 #if CONFIG_DEPENDENT_HORZTILES
   RANGE_CHECK_HI(extra_cfg, dependent_horz_tiles, 1);
 #endif