PM: domains: Allow genpd providers to manage OPP tables directly by its FW

In some cases the OPP tables aren't specified in device tree, but rather
encoded in the FW. To allow a genpd provider to specify them dynamically
instead, let's add a new genpd flag, GENPD_FLAG_OPP_TABLE_FW.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230825112633.236607-13-ulf.hansson@linaro.org


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