firmware: arm_scmi: Add generic OPP support to the SCMI performance domain

To allow a consumer driver to use the OPP library to scale the performance
for its device, let's dynamically add the OPP table when the device gets
attached to its SCMI performance domain.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230925131715.138411-10-ulf.hansson@linaro.org


Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>