API: h264 encode: add intra_idr_period to sequence parameter.
API: h264 encode: add intra_idr_period to sequence parameter.

chenxianqin/vaapi-libva,chenxianqin/vaapi-libva,zzhhui/libva,01org/iotg-lin-gfx-libva,chenxianqin/vaapi-libva,01org/libva-cros,zzhhui/libva,gbeauchesne/libva,01org/libva-cros,pma1/libva,01org/iotg-lin-gfx-libva,pma1/libva,01org/iotg-lin-gfx-libva,01org/libva-cros,pma1/libva,gbeauchesne/libva,gbeauchesne/libva,zzhhui/libva