Merge "vp10 cleanup: remove svc code"

vp10/encoder/aq_cyclicrefresh.c

vp10/encoder/aq_cyclicrefresh.h

vp10/encoder/bitstream.c

vp10/encoder/bitstream.h

vp10/encoder/encodeframe.c

vp10/encoder/encoder.c

vp10/encoder/encoder.h

vp10/encoder/ethread.c

vp10/encoder/firstpass.c

vp10/encoder/firstpass.h

vp10/encoder/lookahead.h

vp10/encoder/ratectrl.c

vp10/encoder/ratectrl.h

vp10/encoder/speed_features.c

vp10/encoder/svc_layercontext.c

vp10/encoder/svc_layercontext.h

vp10/encoder/temporal_filter.c

vp10/vp10_cx_iface.c

vp10/vp10cx.mk