fix(st-pmic): correct verbose message

Replace %d with %u in log, to avoid warning when
-Wformat-signedness is enabled.

Change-Id: Ied5823520181f225ae09bd164e2e52e9a7692c60
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/drivers/st/pmic/stm32mp_pmic.c b/drivers/st/pmic/stm32mp_pmic.c
index 6a30dce..0139661 100644
--- a/drivers/st/pmic/stm32mp_pmic.c
+++ b/drivers/st/pmic/stm32mp_pmic.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2021, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2017-2022, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -337,7 +337,7 @@
 
 static int pmic_set_state(const struct regul_description *desc, bool enable)
 {
-	VERBOSE("%s: set state to %u\n", desc->node_name, enable);
+	VERBOSE("%s: set state to %d\n", desc->node_name, enable);
 
 	if (enable == STATE_ENABLE) {
 		return stpmic1_regulator_enable(desc->node_name);