Fix 4x16 row scan
Fix 4x16 row scan

Change-Id: Iad3c54cc905a7d337766c3c8ae59109327d5c5ae

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom