regulator: maintainers - add maintainers for regulator framework.

Adds Liam Girdwood and Mark Brown as regulator framework maintainers.
Signed-off-by: NLiam Girdwood <lg@opensource.wolfsonmicro.com>

MAINTAINERS

@@ -4504,6 +4504,15 @@ M:	kaber@trash.net
 L:	netdev@vger.kernel.org
 S:	Maintained
 
+VOLTAGE AND CURRENT REGULATOR FRAMEWORK
+P:	Liam Girdwood
+M:	lg@opensource.wolfsonmicro.com
+P:	Mark Brown
+M:	broonie@opensource.wolfsonmicro.com
+W:	http://opensource.wolfsonmicro.com/node/15
+T:	git kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6.git
+S:	Supported
+
 VT1211 HARDWARE MONITOR DRIVER
 P:	Juerg Haefliger
 M:	juergh@gmail.com