Initialize one 10bit-scaling gpe_context for Gen9

Initialize one 10bit-scaling gpe_context for Gen9

V1->V2: Add the conv_p010.g9b shader into the dist list

V3: remove the compiler warnings

gen9_vme.c: In function 'gen9_intel_init_hevc_surface':
gen9_vme.c:1836:9: warning: implicit declaration of function 'i965_image_processing' [-Wimplicit-function-declaration]

i965_render.c: In function 'intel_render_put_surface':
i965_render.c:3079:5: warning: implicit declaration of function 'i965_post_processing' [-Wimplicit-function-declaration]

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>
Reviewed-by: Sean V Kelley <seanvk@posteo.de>