arm: stm32mp: add CONFIG_STM32MP15_PWR

Add config CONFIG_STM32MP15_PWR to handle the
access to regulators managed by the PWR driver defined in
pwr_regulator.c

This driver is only used in U-Boot by STM32MP15x family.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
2 files changed