[PATCH V3] platform-driver-x86: EC Extra driver for Oaktrail

[Yin Kangkai]

Patch V3

Changes from V2 to V3:

  - add rfkill_init_sw_state() during rfkill setup, to make sure the rfkill
    initial state is right.
  - change _oaktrail_rfkill_cleanup to __oaktrail_rfkill_cleanup.
  - remove two un-needed "return".
  - depends on RFKILL || RFKILL = n

Changes from V1 to V2:
  - remove wifi, bt, gps, wwan from /sys/devices/platform.
  - add some helper function for rfkill alloc and rfkill cleanup.
  - add MODULE_ALIAS.
  - add Documentation/ABI/testing/sysfs-platform-intel-oaktrail
  - various other minor changes.
  - bump driver version from 0.1 to 0.2

Thanks for the review.