ARM: dts: rmobile: Import proper DTS for H2 Stout

Replace the placeholder DTS for R8A7790 H2 Stout with a proper
DTS from Linux next .

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>