arm64: dts: rockchip: enable usb-host regulators at boot on rk3328-rock64

After commit ef05bcb6, boot from USB drives is broken.
Fix this problem by enabling usb-host regulators during boot time.

Fixes: ef05bcb6

 ("arm64: dts: rockchip: fix vcc_host1_5v pin assign on rk3328-rock64")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Voytik <voytikd@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>