Rework GPE handling

The current GPE code attempts to define GPEs as either runtime (the 
default), wake or run/wake. These states are orthogonal to whether or 
not a GPE is actually enabled or not. Further, various additional flags 
are defined and set, but never used.

This architecture is additionally complicated by changing the type of a 
GPE causing it to be disabled, resulting in complex functions that then 
have to conditionally re-enable a GPE. It also makes it impossible to 
determine how many consumers a given GPE has, preventing us from 
being able to implement runtime power management for devices requiring 
GPEs for wakeup notification.

This patchset adds a new, simpler API and transitions the existing users 
over to it. It then removes the old code.

 drivers/acpi/acpica/acevents.h |    6 -
 drivers/acpi/acpica/aclocal.h  |    2 
 drivers/acpi/acpica/evgpe.c    |  150 ++++---------------------------------
 drivers/acpi/acpica/evgpeblk.c |  164 +----------------------------------------
 drivers/acpi/acpica/evxface.c  |   14 ---
 drivers/acpi/acpica/evxfevnt.c |  139 ++++++++++++++++++++++++++++++++--
 drivers/acpi/button.c          |   18 +++-
 drivers/acpi/ec.c              |    5 -
 drivers/acpi/wakeup.c          |   57 +++-----------
 include/acpi/acpixf.h          |    8 ++
 include/acpi/actypes.h         |   32 ++------
 11 files changed, 197 insertions(+), 398 deletions(-)

-- 
Matthew Garrett | mjg59@srcf.ucam.org
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