This driver is only used by ipq806x SoCs. Move it there and drop
dependency from ipq40xx since it's not used anywere.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
[rebase on changes to previous patches]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Tested-by: Paul Blazejowski <paulb@blazebox.homeip.net> [R7800]