ARM: dts: sama5d4: add support for Ka-Ro electronics TXA5 modules

[Lothar Waßmann]

This patchset adds support for the Ka-Ro electronics TXA5 modules.

The first patch is a cleanup patch without functional changes.
The second patch adds some labels to DTS nodes which are used in the
third patch.

ARM: dts: sama5d4: cleanup - add blank lines between pinctrl nodes
ARM: dts: sama5d4: add labels for watchdog and pinctrl nodes
ARM: dts: sama5d4: add support for Ka-Ro electronics TXA5 modules