Improve the HEVC encoding quality on SKL/APL/KBL

Improve the HEVC encoding quality on SKL/APL/KBL

V1:
1, Update the commit date
2, Add extern to a function prototype
3, Reallocate resource for different resolution pictures
4, Move static constant array ftq_25i[]
5, Free res_pak_slice_batch_buffer before flush the batch buffer
6, Add cache attribute setting
7, Fix write domain issue of output surface
8, Remove the wrong bit setting in pipe_select
9, Correct the licensing declaration
10, Move hevc enc apis declaration to the enc common api file
11, Add two field bits in PAK pic_state

V2:
1, Move QM/FM default tables out of the function
2, Set the private_data for obj_surface before allocating the surface
3, Move hevc_qpc_table[] into gen9_hevc_encoder.c
4, Alocate independent ME gpe context for each HMEs
5, Reconfigure the VFE state
6, Remove the i965_zero_gpe_resource in ALLOC_GPE_RESOURCE
7, Unify the coding style

V3:
1, Fix memory clear size mistake in intra_distortion
2, Disable multi-slices support for HEVC encoding

Signed-off-by: peng.chen <peng.c.chen@intel.com>