Add STM32H7_STM32H7X0XX chip family.
Add new chip configurations for STM32H750 variants in Kconfig, update
hardware includes to support CONFIG_STM32H7_STM32H7X0XX, and modify
board configurations for stm32h750b-dk to use STM32H750XB.
This enables support for the new STM32H750 chip series with appropriate
memory and peripheral mappings.
Normalize the defconfig files for boards from stm32f7 chip family.
Signed-off-by: Sergey Rzhevsky <rzsa@yandex.ru>
d195260894