dt-bindings: usb: mtu3: remove optional pinctrls

Remove optional pinctrls due to using FORCE/RG_IDDIG to implement
manual switch function.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Chunfeng Yun 2017-10-13 17:10:49 +08:00 • committed by Felipe Balbi
commit 32428aa22d