software node: Update MAINTAINERS data base

There are two updates to the MAINTAINERS regarding to software node API:
- add Daniel Scally to be designated reviewer
- add Sakari Ailus to be designated reviewer
- add rather tightly related device property files to the list
- due to above adjust section name accordingly

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Daniel Scally <djrscally@gmail.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

MAINTAINERS

@@ -17640,12 +17640,17 @@ F:	drivers/firmware/arm_sdei.c
 F:	include/linux/arm_sdei.h
 F:	include/uapi/linux/arm_sdei.h
 
-SOFTWARE NODES
+SOFTWARE NODES AND DEVICE PROPERTIES
 R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+R:	Daniel Scally <djrscally@gmail.com>
 R:	Heikki Krogerus <heikki.krogerus@linux.intel.com>
+R:	Sakari Ailus <sakari.ailus@linux.intel.com>
 L:	linux-acpi@vger.kernel.org
 S:	Maintained
+F:	drivers/base/property.c
 F:	drivers/base/swnode.c
+F:	include/linux/fwnode.h
+F:	include/linux/property.h
 
 SOFTWARE RAID (Multiple Disks) SUPPORT
 M:	Song Liu <song@kernel.org>