ipq8064: update dtsi with new opp table

The new driver use opp table to register frequency.
Drop psv bindings as they are not used anymore.
Adds speedbin definition for nvmem driver

Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [nbg6817/ipq8065]
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>