[Bug 203610] [patch][asmc] Patch for MacBookAir,5.2

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203610

            Bug ID: 203610
           Summary: [patch][asmc] Patch for MacBookAir,5.2
           Product: Base System
           Version: 10.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Keywords: patch
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: naito.yuichiro at gmail.com
          Keywords: patch

Created attachment 161793
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=161793&action=edit
[patch] asmc(4)

I'm using MacBookAir 13" late 2012 model for FreeBSD 10.2-R.
UEFI boot works fine. Thanks for big effort of the feature.

I wrote a patch for asmc(4) to control keyboard backlight.

This patch adds model name entries used in the probe function.
I added following two #define symbols for the entries.

  (1) ASMC_SMS_FUNCS_DISABLED
  (2) ASMC_FAN_FUNCS2

(1) is used to disable Sudden Motion Sensor(SMS).
MacBoookAir,5.2 doesn't have SMS.
asmc(4) must skip probing SMS.

(2) is another set of FAN functions.
MacBookAir,5.2 misses fan safe speed.

I tested on my MacbookAir.
And I think both 13" and 11" are same hardware,
MacBookAir,5.1 entry works on the same way.

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