rpmsg: core: Drop dev_pm_domain_detach() call

Starting with commit f995080 ("PM: domains: Detach on
device_unbind_cleanup()"), there is no longer a need to call
dev_pm_domain_detach() in the bus remove function. The
device_unbind_cleanup() function now handles this to avoid
invoking devres cleanup handlers while the PM domain is
powered off, which could otherwise lead to failures as
described in the above-mentioned commit.

Drop the explicit dev_pm_domain_detach() call and rely instead
on the flags passed to dev_pm_domain_attach() to power off the
domain.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250827101352.927542-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Author: claudiubeznea

drivers/rpmsg/rpmsg_core.c

@@ -479,7 +479,8 @@ static int rpmsg_dev_probe(struct device *dev)
 	struct rpmsg_endpoint *ept = NULL;
 	int err;
 
-	err = dev_pm_domain_attach(dev, PD_FLAG_ATTACH_POWER_ON);
+	err = dev_pm_domain_attach(dev, PD_FLAG_ATTACH_POWER_ON |
+					PD_FLAG_DETACH_POWER_OFF);
 	if (err)
 		goto out;
 
@@ -538,8 +539,6 @@ static void rpmsg_dev_remove(struct device *dev)
 	if (rpdrv->remove)
 		rpdrv->remove(rpdev);
 
-	dev_pm_domain_detach(dev, true);
-
 	if (rpdev->ept)
 		rpmsg_destroy_ept(rpdev->ept);
 }