clk: keystone: pll: Unmap region obtained by of_iomap

Free memory mapping, if of_pll_div_clk_init is not successful.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/keystone/pll.c

@@ -267,25 +267,30 @@ static void __init of_pll_div_clk_init(struct device_node *node)
 	parent_name = of_clk_get_parent_name(node, 0);
 	if (!parent_name) {
 		pr_err("%s: missing parent clock\n", __func__);
+		iounmap(reg);
 		return;
 	}
 
 	if (of_property_read_u32(node, "bit-shift", &shift)) {
 		pr_err("%s: missing 'shift' property\n", __func__);
+		iounmap(reg);
 		return;
 	}
 
 	if (of_property_read_u32(node, "bit-mask", &mask)) {
 		pr_err("%s: missing 'bit-mask' property\n", __func__);
+		iounmap(reg);
 		return;
 	}
 
 	clk = clk_register_divider(NULL, clk_name, parent_name, 0, reg, shift,
 				 mask, 0, NULL);
-	if (clk)
+	if (clk) {
 		of_clk_add_provider(node, of_clk_src_simple_get, clk);
-	else
+	} else {
 		pr_err("%s: error registering divider %s\n", __func__, clk_name);
+		iounmap(reg);
+	}
 }
 CLK_OF_DECLARE(pll_divider_clock, "ti,keystone,pll-divider-clock", of_pll_div_clk_init);