arm: mach-stm32mp: Add newline to the MAC error message

Without newline, the error message appears for non prgrammed OTP boards
looks messsy. Hence add it to look more clean.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/mach-stm32mp/cpu.c b/arch/arm/mach-stm32mp/cpu.c
index 7b4431c..e1a0a13 100644
--- a/arch/arm/mach-stm32mp/cpu.c
+++ b/arch/arm/mach-stm32mp/cpu.c
@@ -481,7 +481,7 @@
 		enetaddr[i] = ((uint8_t *)&otp)[i];
 
 	if (!is_valid_ethaddr(enetaddr)) {
-		pr_err("invalid MAC address in OTP %pM", enetaddr);
+		pr_err("invalid MAC address in OTP %pM\n", enetaddr);
 		return -EINVAL;
 	}
 	pr_debug("OTP MAC address = %pM\n", enetaddr);