ARM: dts: rmobile: Add soc label to Gen3

Add label to the /soc node, so it can be referenced from the U-Boot DTs.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
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V2: Rebase on u-boot/master
4 files changed