drivercore / platform: Convert to dev_pm_domain_attach|detach()

drivercore / platform: Convert to dev_pm_domain_attach|detach()

Previously only the ACPI PM domain was supported by the platform bus.

Let's convert to the common attach/detach functions for PM domains,
which currently means we are extending the support to include the
generic PM domain as well.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit cb51841397e8e5714cf82a7f91053f6e1fb80d1f)
(cherry picked from commit cd4edd4cb84f9dadb9e8f12b1e1f10bf2ef28749)