bootrec: update gpio-keys node

* Moved after switching to pre-4.3 sensor drivers
* Kernel commit 97863f1f43cc8be4c6c359b4b976fc123aea6e6b
  (Change-Id: Ie5664e16afb1388f45f1006b93bd7c26132b9674)
Change-Id: I0843c82e23ca99c18af90adfdfb828573bdbf719