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>
Add support for ST Micro Nucleo-64 board with the STM32F302R8
processor. nucleo_f429zi and nucleo_f334r8 were used as
references.
Signed-off-by: Galen Seitz <galens@seitzassoc.com>