MAINTAINERS: power_supply: update maintainership

Take over maintanence for orphaned power supply subsystem
and assign linux-pm@vger.kernel.org as mailing list.
Signed-off-by: NSebastian Reichel <sre@kernel.org>
Acked-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

MAINTAINERS

@@ -7028,8 +7028,10 @@ F:	include/linux/timer*
 F:	kernel/*timer*
 
 POWER SUPPLY CLASS/SUBSYSTEM and DRIVERS
+M:	Sebastian Reichel <sre@kernel.org>
 M:	Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 M:	David Woodhouse <dwmw2@infradead.org>
+L:	linux-pm@vger.kernel.org
 T:	git git://git.infradead.org/battery-2.6.git
 S:	Maintained
 F:	include/linux/power_supply.h