leds: Document the context brightness_set needs
authorRichard Purdie <rpurdie@rpsys.net>
Thu, 24 Apr 2008 22:49:30 +0000 (23:49 +0100)
committerRichard Purdie <rpurdie@rpsys.net>
Thu, 24 Apr 2008 22:49:30 +0000 (23:49 +0100)
Make sure there is no confusion about the contexts brightness_set
can be called under by documenting it.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

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