ARM: dts: rockchip: adapt regulator nodenames to preferred form

ARM: dts: rockchip: adapt regulator nodenames to preferred form

The preferred nodename for fixed-regulators has changed to
pattern: '^regulator(-[0-9]+v[0-9]+|-[0-9a-z-]+)?$'

Fix all Rockchip DT regulator nodenames.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/cfc3cfe1-086b-48f1-9b89-f17c9391d3cc@gmail.com
[Also include the backlight-regulator and panel-regulator from
 rk3288-veyron-edp, and adapt the Pinky device accordingly]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>