power: rename stpmu1 to official name stpmic1

Alignment with kernel driver name & binding
introduced by https://patchwork.kernel.org/cover/10761943/
to use the final marketing name = STPMIC1.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index fa27cad..ac52155 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -59,11 +59,11 @@
 # CONFIG_SPL_PINCTRL_FULL is not set
 CONFIG_DM_PMIC=y
 # CONFIG_SPL_PMIC_CHILDREN is not set
-CONFIG_PMIC_STPMU1=y
+CONFIG_PMIC_STPMIC1=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_DM_REGULATOR_STM32_VREFBUF=y
-CONFIG_DM_REGULATOR_STPMU1=y
+CONFIG_DM_REGULATOR_STPMIC1=y
 CONFIG_SERIAL_RX_BUFFER=y
 CONFIG_STM32_SERIAL=y
 CONFIG_USB=y