sh: r2dplus: Fix missing PCI range

Add missing PCI range for translating DRAM to bus addresses.
This fixes e.g. PCI NIC interface and allows network to work
in QEMU.

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