ARM: dts: sun7i: lamobo-r1: Fix USB-based WiFi module power

On the Lamobo R1, USB2 is connected to the RTL8192CU WiFi module.
The power enable pin is connected to PH12.

Fix the enable pin the reg_usb2_vbus.

Also disable ohci1, as the WiFi module is USB 2.0 capable.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>