EC events indicate change in AC power connectivity, battery state of

EC events indicate change in AC power connectivity, battery state of
charge, battery error, battery presence, etc.  Send notifications to the
power supply subsystem when changes are detected.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Andres Salomon <dilinger@queued.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>