ARM: multi_v7_defconfig: enable STM32 PWR regulator

This enables the driver for STM32 PWR regulators found on stm32mp1.

Link: https://lore.kernel.org/r/20200109125531.13610-1-alexandre.torgue@st.comSigned-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/configs/multi_v7_defconfig

@@ -591,6 +591,7 @@ CONFIG_REGULATOR_S2MPS11=y
 CONFIG_REGULATOR_S5M8767=y
 CONFIG_REGULATOR_STM32_BOOSTER=m
 CONFIG_REGULATOR_STM32_VREFBUF=m
+CONFIG_REGULATOR_STM32_PWR=y
 CONFIG_REGULATOR_STPMIC1=y
 CONFIG_REGULATOR_TI_ABB=y
 CONFIG_REGULATOR_TPS51632=y