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

Free memory mapping, if lpc18xx_ccu_init() is not successful.

Signed-off-by: Arvind Yadav <[e-mail]>
Acked-by: Joachim Eastwood <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

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

···
 	}
 
 	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;
 	}