clk: nxp: clk-lpc18xx-ccu: Unmap region obtained by of_iomap

Free memory mapping, if lpc18xx_ccu_init() is not successful.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

drivers/clk/nxp/clk-lpc18xx-ccu.c

@@ -277,12 +277,15 @@ static void __init lpc18xx_ccu_init(struct device_node *np)
 	}
 
 	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
-	if (!clk_data)
+	if (!clk_data) {
+		iounmap(reg_base);
 		return;
+	}
 
 	clk_data->num = of_property_count_strings(np, "clock-names");
 	clk_data->name = kcalloc(clk_data->num, sizeof(char *), GFP_KERNEL);
 	if (!clk_data->name) {
+		iounmap(reg_base);
 		kfree(clk_data);
 		return;
 	}