STM32 uart Kconfig instance flags were not following
same naming scheme than other drivers (i2c, spi, ..)
Update driver to use UART_X instead of UART_STM32_PORT_X
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Support the ST STM32F0DISCOVERY board with STM32F051R8T6 SoC
Tested with:
- `samples/basic/blinky`
- `samples/basic/button`
Includes flash config in `stm32f0_disco.rst` for use with mcuboot
Signed-off-by: Nathan Tsoi <nathan@vertile.com>