altivec: more endian fixes
altivec: more endian fixes

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