fdts: stm32mp1: realign device tree files with internal devs

Update DDR parameters to version 1.45.
Remove useless sdmmc1_dir_pins_b node.
Add USART3 and UART7 nodes.
Correct a PMIC value for USB regulator.
Add TIMER12, TIMER15, CRYP, HASH and USBOTG_HS nodes.
Update DTSI file for SDMMC compatible, but overwrite it with the former
name.
Move BSEC board_id node to boards DTS files, as this OTP is specific to
STMicroelectronics boards.

Change-Id: If4d2fe090c6a8368afe8e21e5ac70579911d3939
Signed-off-by: Yann Gautier <yann.gautier@st.com>