Some newly added drivers do not set backlight type, as a result
/sys/class/backlight/<backlight>/type shows incorrect backlight type.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Cc: Corentin Chary <corentin.chary@gmail.com>
Cc: Yin Kangkai <kangkai.yin@intel.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

This driver implements an Extra ACPI EC driver for products based on Intel
Oaktrail platform.

This driver does below things:
1. registers itself in the Linux backlight control in
   /sys/class/backlight/intel_oaktrail/

2. registers in the rfkill subsystem here: /sys/class/rfkill/rfkillX/
   for these components: wifi, bluetooth, wwan (3g), gps
Signed-off-by: NYin Kangkai <kangkai.yin@linux.intel.com>

[Extracted from a bigger patch by Yin Kangkai, this version leaves out some
 sysfs bits that probably want to be driver managed, and ACPI i2c enumeration]
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>