clk: rockchip: disable alt_parent clk in err cases when registering cpuclk

Add clk_disable_unprepare to handle cpuclk->alt_parent if
rockchip_clk_register_cpuclk fails.

Signed-off-by: Shawn Lin <[e-mail]>
Signed-off-by: Heiko Stuebner <[e-mail]>

drivers/clk/rockchip/clk-cpu.c

···
 		pr_err("%s: could not lookup parent clock %s\n",
 		       __func__, parent_names[0]);
 		ret = -EINVAL;
-		goto free_cpuclk;
+		goto free_alt_parent;
 	}
 
 	ret = clk_notifier_register(clk, &cpuclk->clk_nb);
 	if (ret) {
 		pr_err("%s: failed to register clock notifier for %s\n",
 				__func__, name);
-		goto free_cpuclk;
+		goto free_alt_parent;
 	}
 
 	if (nrates > 0) {
···
 	kfree(cpuclk->rate_table);
 unregister_notifier:
 	clk_notifier_unregister(clk, &cpuclk->clk_nb);
+free_alt_parent:
+	clk_disable_unprepare(cpuclk->alt_parent);
 free_cpuclk:
 	kfree(cpuclk);
 	return ERR_PTR(ret);