clk: qcom: Fix missing error check for dev_pm_domain_attach()

In the current implementation, the return value of dev_pm_domain_attach()
is not checked. This can lead to silent failures if the function fails,
as the code would continue execution and return 0, ignoring the error.

This patch adds a check for the return value of dev_pm_domain_attach().
If the function fails, an error message is logged using dev_err_probe(),
and the error is propagated to the existing error handling path `err`,
which ensures proper cleanup by calling clk_notifier_unregister().

Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://lore.kernel.org/r/20250211092017.562-1-vulab@iscas.ac.cn
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: ISCAS-Vulab

drivers/clk/qcom/apcs-sdx55.c

@@ -111,7 +111,11 @@ static int qcom_apcs_sdx55_clk_probe(struct platform_device *pdev)
 	 * driver, there seems to be no better place to do this. So do it here!
 	 */
 	cpu_dev = get_cpu_device(0);
-	dev_pm_domain_attach(cpu_dev, true);
+	ret = dev_pm_domain_attach(cpu_dev, true);
+	if (ret) {
+		dev_err_probe(dev, ret, "can't get PM domain: %d\n", ret);
+		goto err;
+	}
 
 	return 0;