Add needed uart pinctrl configuration in pinmux node.
This is done thanks to <soc>-pinctrl.dtsi file matching
the <soc>.dtsi files
Populate stm32 f4 based boards dts files with references
to uart pinctrl nodes.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Add necessary board files, pinmux and device tree in order to have a
usable debug console.
Origin: Original
Change-Id: I280320700352fd36a544c03f4e57d2eeec2449e5
Signed-off-by: Florian Vaussard <florian.vaussard@heig-vd.ch>