To prepare to upcoming dtc v1.4.6, fix warnings in dts files.
This commit addresses the following warning:
Warning (unit_address_vs_reg): Node /soc/pin-controller has a reg
or ranges property, but no unit name
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
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>