Merge changes from topic "yg/stm32mp1_wdg_updates" into integration
* changes:
mmc: stm32_sdmmc2: correctly manage block size
mmc: stm32_sdmmc2: manage max-frequency property from DT
stm32mp1: move check_header() to common code
stm32mp1: keep console during runtime
stm32mp1: sp_min: initialize MMU and cache earlier
stm32mp1: add support for LpDDR3
stm32mp1: use a common function to check spinlock is available
clk: stm32mp: enable RTCAPB clock for dual-core chips
stm32mp1: check if the SoC is single core
stm32mp1: print information about board
stm32mp1: print information about SoC
stm32mp1: add watchdog support
