ARM: dts: mvebu: remove unnecessary PCI range from 98dx3236

The Marvell 98dx3236 SoC only has a single PCIe x1 interface. The "Port
0.1 MEM" range was errantly kept when creating a specific dts for the
SoC.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>