Fix overlapping memcpy areas in impeg2_mc_fullx_fully_8x8

Bug: 231026247

Change-Id: Ic6a6b58085816a38c4800ccfe2de82435a4e7373
diff --git a/common/impeg2_inter_pred.c b/common/impeg2_inter_pred.c
index 019fa5c..7315664 100644
--- a/common/impeg2_inter_pred.c
+++ b/common/impeg2_inter_pred.c
@@ -459,7 +459,7 @@
 
     for(i = 0; i < BLK_SIZE; i++)
     {
-        memcpy(pu1_out, pu1_ref, BLK_SIZE);
+        memmove(pu1_out, pu1_ref, BLK_SIZE);
         pu1_ref += u4_ref_wid;
         pu1_out += u4_out_wid;
     }