[PATCH][utopic][vivid] dell-rbtn: handle new wireless hotkey button

[Alex Hung]

SRU Justification:

Impact:
  Dell introduced a new ACPI device to handle wireless hotkey. The mechanism 
  depreciates the original WMI method and a new driver is required.

Fix:
  The new driver handles new events and fix the problem that wireless hoteky 
  does not work on new Dell systems

  The patches are included in upstream and are cherry-picked from Linus's repo.

Tested:
  This patch is tested on Dell Inspiron 3543 an 3135

BugLink: http://bugs.launchpad.net/bugs/1440949


Pali Rohár (1):
  dell-rbtn: Dell Airplane Mode Switch driver

 MAINTAINERS                      |   10 ++
 drivers/platform/x86/Kconfig     |   16 ++
 drivers/platform/x86/Makefile    |    1 +
 drivers/platform/x86/dell-rbtn.c |  332 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 359 insertions(+)
 create mode 100644 drivers/platform/x86/dell-rbtn.c

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1.7.9.5