ARM: dts: rmobile: Extract i2c6 on M2W Porter

The i2c6 node is missing in mainline Linux thus far, pull it
into U-Boot specific DT until it hits mainline Linux, to make
syncing of DTs easier.

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