ipq806x: move mass market ipq8064 to v2 dtsi

ipq806x: move mass market ipq8064 to v2 dtsi

According to OEM bootlog entry mass market devices are ipq8064 SoC
v2.0:
> socinfo_init: v6, id=202, ver=2.0, raw_id=2064, raw_ver=2064, hw_plat=0,  hw_plat_ver=65536

I've checked C2600, EA8500 and VR2600v but couldn't find other
boards bootlog. I think it's safe to assume that other boards are
also v2.0. R7500 may be an exception because it was the first
device to hit the market.

So switch to v2.0 dtsi.

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
[slh: rebase for kernel v4.14 as well]
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>