PM / Domains: Add DT file to MAINTAINERS

Add the power_domain.txt DT file to MAINTAINERS, otherwise
get_maintainers.pl doesn't pick the right set of maintainers for changes
to the DT file.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Ulf Hansson <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: vireshk

MAINTAINERS

@@ -5493,6 +5493,7 @@ L:	[email protected]
 S:	Supported
 F:	drivers/base/power/domain*.c
 F:	include/linux/pm_domain.h
+F:	Documentation/devicetree/bindings/power/power_domain.txt
 
 GENERIC UIO DRIVER FOR PCI DEVICES
 M:	"Michael S. Tsirkin" <[email protected]>