ARM: dts: rza2mevb: sort nodes of rza2mevb board

This patch sorts the nodes of arch/arm/boot/dts/r7s9210-rza2mevb.dts.

* Sort subnodes of root ("/") node alphabetically
* Sort following top-level nodes alphabetically
* Sort subnodes of pinctrl alphabetically

Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
[simon: rebase and sort new ehci nodes]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>