sony-laptop: add to MAINTAINERS

Signed-off-by: NMattia Dongili <malattia@linux.it>
Signed-off-by: NLen Brown <len.brown@intel.com>

MAINTAINERS

@@ -3004,6 +3004,8 @@ S:	Maintained
 SONY VAIO CONTROL DEVICE DRIVER
 P:	Stelian Pop
 M:	stelian@popies.net
+P:	Mattia Dongili
+M:	malattia@linux.it
 W:	http://popies.net/sonypi/
 S:	Maintained