Add a missing #if flag for lpf-sb

Change-Id: Ifa58c1dcc5312ca82f15d4dcd11e49960abd3535
diff --git a/av1/common/mvref_common.h b/av1/common/mvref_common.h
index b965078..67bfca6 100644
--- a/av1/common/mvref_common.h
+++ b/av1/common/mvref_common.h
@@ -461,7 +461,9 @@
 #define INTRABC_DELAY_PIXELS 256  //  Delay of 256 pixels
 #define INTRABC_DELAY_SB64 (INTRABC_DELAY_PIXELS / 64)
 #define USE_WAVE_FRONT 1  // Use only top left area of frame for reference.
+#if CONFIG_LPF_SB
 #define INTRABC_ROW_DELAY 8
+#endif  // CONFIG_LPF_SB
 
 static INLINE void av1_find_ref_dv(int_mv *ref_dv, const TileInfo *const tile,
                                    int mib_size, int mi_row, int mi_col) {