Cleanup gen9_mfc.c
Cleanup gen9_mfc.c

This patch removes all unneeded functions/variables in gen9_mfc.c for mfc pipeline setting.

Especially it doesn't include shaders/utils/mfc_batchbuffer_avc_intra.g9b and
shaders/utils/mfc_batchbuffer_avc_inter.g9b in gen9_mfc.c because the two .g9b files are no longer
included in the package created by 'make dist'

C       i965_drv_video_la-gen9_mfc.lo
gen9_mfc.c:54:55: fatal error: shaders/utils/mfc_batchbuffer_avc_intra.g9b: No such file or directory
 #include "shaders/utils/mfc_batchbuffer_avc_intra.g9b"

Signed-off-by: Xiang, Haihao <8d677183e5993577d4fa73a419b76987913292d6@intel.com>
Reviewed-by: Zhao Yakui <21bae65ecea50a19bd9d0fef489914760189fd5b@intel.com>
(cherry picked from commit 2c213d3a071c540eaba23eb2ef82db6e33327a4f)

01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver