configs: odroid-n2: update for HDMI output & USB keyboard

Enable options to permit HDMI output on Odroid-N2 G12B boards.
Enable VPU Power Domain.
Enable USB_KEYBOARD.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>