media: venus: hfi_platform: Correct supported codecs for sc7280

VP8 codec is deprecated for sc7280 SOC. Fix in platform layer to
update the supported codecs accordingly.

Signed-off-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Acked-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Tested-by: Fritz <Koenig&lt;frkoenig@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>