arm64: dts: rockchip: fix usb regulator for Lunzn Fastrhino R6xS

Remove the non-existent usb_host regulator and fix the supply according
to the schematic. Also remove the unnecessary always-on and boot-on for
the usb_otg regulator.

Fixes: c79dab40 ("arm64: dts: rockchip: Add Lunzn Fastrhino R66S")
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20240701143028.1203997-2-amadeus@jmu.edu.cn


Signed-off-by: Heiko Stuebner <heiko@sntech.de>