ASoC: rockchip: Discard pm_runtime_put() return value

ASoC: rockchip: Discard pm_runtime_put() return value

It is better to check directly whether or not CONFIG_PM has
been enabled instead of relying on an error value returned by
pm_runtime_put() in that case because pm_runtime_put() may also return
an error value in other cases, like after writing "on" to the devices'
runtime PM "control" attribute in sysfs for one example.

This will facilitate a planned change of the pm_runtime_put() return
type to void in the future.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/5160923.0VBMTVartN@rafael.j.wysocki
Signed-off-by: Mark Brown <broonie@kernel.org>