power: fan53555: Fix missing newline in error message

Avoid concatenation with following message.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/power/pmic/fan53555.c b/drivers/power/pmic/fan53555.c
index 4d1e686..0d91628 100644
--- a/drivers/power/pmic/fan53555.c
+++ b/drivers/power/pmic/fan53555.c
@@ -23,7 +23,7 @@
 			      u8 *buff, int len)
 {
 	if (dm_i2c_read(dev, reg, buff, len)) {
-		pr_err("%s: read error for register: %#x!", dev->name, reg);
+		pr_err("%s: read error for register: %#x!\n", dev->name, reg);
 		return -EIO;
 	}