regulator: maintainers: Update email address for Liam

Liam sent a patch[1] to update his email, but it only updates the
maintainer entry for ASoC. This patch updates the entry for regulator subsystem
to ensure get_maintainer.pl returns correct email address for maintainers.

[1] https://lkml.org/lkml/2013/1/15/344Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

MAINTAINERS

@@ -8705,7 +8705,7 @@ F:	drivers/scsi/vmw_pvscsi.c
 F:	drivers/scsi/vmw_pvscsi.h
 
 VOLTAGE AND CURRENT REGULATOR FRAMEWORK
-M:	Liam Girdwood <lrg@ti.com>
+M:	Liam Girdwood <lgirdwood@gmail.com>
 M:	Mark Brown <broonie@opensource.wolfsonmicro.com>
 W:	http://opensource.wolfsonmicro.com/node/15
 W:	http://www.slimlogic.co.uk/?p=48