mediatek: mt7622: fix banana pi r64 wps button

mediatek: mt7622: fix banana pi r64 wps button

Fix the wps button to prevent wrongly detected recovery procedures.
In the official banana pi r64 git the wps button is set to
GPIO_ACTIVE_LOW and not GPIO_ACTIVE_HIGH.

Import patch to fix on boot unwanted recovery entering:

  Press the [f] key and hit [enter] to enter failsafe mode
  Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
  - failsafe button wps was pressed -
  - failsafe -

Signed-off-by: Nick Hainke <vincent@systemli.org>