Merge changes I93de2db1,I880f88b1,I02e2fc75,I48908413,Ie7de9a9f, ... into integration

* changes:
feat(st-ddr): add STM32MP2 driver
refactor(st-ddr): create generic services
refactor(st-ddr): r

Merge changes I93de2db1,I880f88b1,I02e2fc75,I48908413,Ie7de9a9f, ... into integration

* changes:
feat(st-ddr): add STM32MP2 driver
refactor(st-ddr): create generic services
refactor(st-ddr): remove name from stm32mp_ddr_reg_desc
refactor(st-ddr): add definition for timeouts and delays
feat(st): add stm32mp_is_wakeup_from_standby()
feat(stm32mp2): add RETRAM map/unmap capability
feat(stm32mp2): add helper to get DDRDBG base address
feat(stm32mp2): handle DDR power supplies
feat(stm32mp1): handle DDR power supplies

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feat(stm32mp1): handle DDR power supplies

Modify the DDR driver to handle the DDR power supplies when a PMIC
is present in the function stm32mp_board_ddr_power_init(), define
in the platform file.

feat(stm32mp1): handle DDR power supplies

Modify the DDR driver to handle the DDR power supplies when a PMIC
is present in the function stm32mp_board_ddr_power_init(), define
in the platform file.

This patch allows to easily modify the used DDR power supplies
for customer boards, when they don't use STPMIC1 PMU or when
the regulators are not connected as on the STMicroelectronics
boards.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Change-Id: I93ee6295ef7032ac20f03608d22cd460f7d87ef5

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