Bring STM32F4/F7 together

Marlin/src/HAL/HAL.h

Marlin/src/HAL/HAL_STM32/persistent_store_impl.cpp

Marlin/src/HAL/HAL_STM32/pinsDebug_STM32GENERIC.h

Marlin/src/HAL/HAL_STM32F1/persistent_store_eeprom.cpp

Marlin/src/HAL/HAL_STM32F4/EmulatedEeprom.cpp

Marlin/src/HAL/HAL_STM32F4/HAL_Servo_STM32F4.cpp

Marlin/src/HAL/HAL_STM32F4/fastio_STM32F4.h

Marlin/src/HAL/HAL_STM32F4/persistent_store_eeprom.cpp

Marlin/src/HAL/HAL_STM32F4/pinsDebug.h

Marlin/src/HAL/HAL_STM32F7/EEPROM_Emul/eeprom_emul.cpp

Marlin/src/HAL/HAL_STM32F7/EEPROM_Emul/eeprom_emul.h

Marlin/src/HAL/HAL_STM32F7/HAL.cpp

Marlin/src/HAL/HAL_STM32F7/HAL.h

Marlin/src/HAL/HAL_STM32F7/HAL_Servo_STM32F7.h

Marlin/src/HAL/HAL_STM32F7/HAL_spi_STM32F7.cpp

Marlin/src/HAL/HAL_STM32F7/SanityCheck.h

Marlin/src/HAL/HAL_STM32F7/endstop_interrupts.h

Marlin/src/HAL/HAL_STM32F7/spi_pins.h

Marlin/src/HAL/HAL_STM32F7/watchdog_STM32F7.cpp

Marlin/src/HAL/HAL_STM32_F4_F7/EmulatedEeprom.cpp