ARM: dts: rockchip: fix swapped Radxa Rock pinctrl references

The host and otg regulator pinctrl settings got swapped, making the host
reference the otg pinctrl and the other way round. The actual pins are
correct (gpio0-3 for host and gpio2-31 for otg).

Reported-by: Naoki FUKAUMI <naobsd@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>