rockchip: dts: rk3328-evb: Move vcc5v0-host-xhci-drv to -u-boot.dtsi

rockchip: dts: rk3328-evb: Move vcc5v0-host-xhci-drv to -u-boot.dtsi

USB 3.0 is only supported in U-boot, not in the Linux kernel where the
device tree files are ultimately synced from. While the xhci node was
moved, the external vbus regulator was not.

Move it as well.

Fixes: 046364d1f6b2 ("rockchip: rk3328: migrate u-boot node to -u-boot.dtsi")
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Loic Devulder <ldevulder@suse.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>