altivec: fix div255w rule
altivec: fix div255w rule

MOXfiles/orc,Distrotech/orc,ahmedammar/platform_external_gst_liborc,mojaves/orc,okuoku/nmosh-orc,MOXfiles/orc,Distrotech/orc,MOXfiles/orc,ijsf/OpenWebRTC-orc,ijsf/OpenWebRTC-orc,ahmedammar/platform_external_gst_liborc,okuoku/nmosh-orc,mojaves/orc,mojaves/orc,jpakkane/orc,ijsf/OpenWebRTC-orc,jpakkane/orc,okuoku/nmosh-orc,Distrotech/orc,jpakkane/orc