PM: runtime: Replace inline function pm_runtime_callbacks_present()

Commit 9a787546 ("PM: runtime: Replace pm_runtime_callbacks_present()")
forgot to change the inline version.

Fixes: 9a787546 ("PM: runtime: Replace pm_runtime_callbacks_present()")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>