CHROMIUM: arm64: dts: rockchip: fix scarlet dmic pinctrl group

Pinctrl nodes need a group node, or else they won't register right:

[    2.627456] rockchip-pinctrl pinctrl: unable to find group for node dmic-en

BUG=none
TEST=boot scarlet, check pinctrl mapping for dmic-en

Change-Id: Ia9a5f451e3143a705e19d08a680561ebe1ca2a10
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/658485
Reviewed-by: Douglas Anderson <dianders@chromium.org>
1 file changed