feat(drivers/st/uart): add uart driver for STM32MP1

Add a UART/USART driver for STM32 with complete a hardware support;
it used for STM32CubeProgrammer support with even parity.

This driver is not used for console, which is already handle
by a simple driver (drivers/st/uart/aarch32/stm32_console.S).

Change-Id: Ia9266e5d177fe7fd09c8a15b81da1a05b1bc8b2d
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
4 files changed