i965_drv_video: clean up
i965_drv_video: clean up

Don't emit PIPE_CONTROL directly, instead call intel_batchbuffer_emit_mi_flush.

Signed-off-by: Xiang, Haihao <8d677183e5993577d4fa73a419b76987913292d6@intel.com>

Distrotech/libva,chenxianqin/vaapi-libva,01org/iotg-lin-gfx-libva,halleyzhao/libva-fdo,01org/libva-cros,gbeauchesne/libva,pma1/libva,Distrotech/libva,01org/libva-cros,01org/iotg-lin-gfx-libva,Distrotech/libva,pma1/libva,CyanogenMod/android_hardware_intel_libva,android-ia/hardware_intel_libva,halleyzhao/libva-fdo,pma1/libva,zzhhui/libva,CyanogenMod/android_hardware_intel_libva,chenxianqin/vaapi-libva,zzhhui/libva,chenxianqin/vaapi-libva,gbeauchesne/libva,halleyzhao/libva-fdo,01org/iotg-lin-gfx-libva,CyanogenMod/android_hardware_intel_libva,android-ia/hardware_intel_libva,android-ia/hardware_intel_libva,zzhhui/libva,gbeauchesne/libva,01org/libva-cros