Fix 16x4 col iscan

Change-Id: Ib6f8b94c82fee8546d741f4472f42c342cbdd55c

av1/common/scan.c

@@ -4343,10 +4343,10 @@ DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_4x16[64]) = {
 };
 
 DECLARE_ALIGNED(16, static const int16_t, av1_mcol_iscan_16x4[64]) = {
-  0,  16, 32, 48, 1,  17, 33, 49, 2,  18, 34, 50, 3,  19, 35, 51,
-  4,  20, 36, 52, 5,  21, 37, 53, 6,  22, 38, 54, 7,  23, 39, 55,
-  8,  24, 40, 56, 9,  25, 41, 57, 10, 26, 42, 58, 11, 27, 43, 59,
-  12, 28, 44, 60, 13, 29, 45, 61, 14, 30, 46, 62, 15, 31, 47, 63,
+  0, 4, 8,  12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60,
+  1, 5, 9,  13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61,
+  2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62,
+  3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55, 59, 63,
 };
 #endif  // CONFIG_EXT_TX