media: venus: Convert to dev_pm_domain_attach|detach_list() for vcodec

Let's avoid some of the boilerplate code to manage the vcodec PM domains,
by converting into using dev_pm_domain_attach|detach_list().

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Cc: Vikash Garodia <quic_vgarodia@quicinc.com>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: <linux-media@vger.kernel.org>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20240130123951.236243-6-ulf.hansson@linaro.org