In addition to just templating, this contains one change to
ff_hevc_put_hevc_epel_bi_hv32_8, by setting the w6 register
which ff_hevc_put_hevc_epel_h32_8_neon requires.

AWS Graviton 3:
put_hevc_epel_bi_hv4_8_c: 176.5
put_hevc_epel_bi_hv4_8_neon: 62.0
put_hevc_epel_bi_hv4_8_i8mm: 58.0
put_hevc_epel_bi_hv6_8_c: 343.7
put_hevc_epel_bi_hv6_8_neon: 109.7
put_hevc_epel_bi_hv6_8_i8mm: 105.7
put_hevc_epel_bi_hv8_8_c: 536.0
put_hevc_epel_bi_hv8_8_neon: 112.7
put_hevc_epel_bi_hv8_8_i8mm: 111.7
put_hevc_epel_bi_hv12_8_c: 1107.7
put_hevc_epel_bi_hv12_8_neon: 254.7
put_hevc_epel_bi_hv12_8_i8mm: 239.0
put_hevc_epel_bi_hv16_8_c: 1927.7
put_hevc_epel_bi_hv16_8_neon: 356.2
put_hevc_epel_bi_hv16_8_i8mm: 334.2
put_hevc_epel_bi_hv24_8_c: 4195.2
put_hevc_epel_bi_hv24_8_neon: 736.7
put_hevc_epel_bi_hv24_8_i8mm: 715.5
put_hevc_epel_bi_hv32_8_c: 7280.5
put_hevc_epel_bi_hv32_8_neon: 1287.7
put_hevc_epel_bi_hv32_8_i8mm: 1162.2
put_hevc_epel_bi_hv48_8_c: 16857.7
put_hevc_epel_bi_hv48_8_neon: 2836.2
put_hevc_epel_bi_hv48_8_i8mm: 2908.5
put_hevc_epel_bi_hv64_8_c: 29248.2
put_hevc_epel_bi_hv64_8_neon: 5051.7
put_hevc_epel_bi_hv64_8_i8mm: 4491.5
Signed-off-by: Martin Storsjö <martin@martin.st>