This patch adds basic support and documentation for the STM32F723E-DISCO
board, with GPIO, USART, I2C and USB support. Two USARTs are enabled,
the VCP one for the console and the Arduino one. The GPIOs are
configured for the 3 LEDs and the button available on the board.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Aurelien Jarno