regulator: MAINTAINERS: update email address

I no longer work at TI.
Signed-off-by: Liam Girdwood <liam.r.girdwood@intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

MAINTAINERS

@@ -7082,7 +7082,7 @@ F:	include/uapi/sound/
 F:	sound/
 
 SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEMENT (ASoC)
-M:	Liam Girdwood <lrg@ti.com>
+M:	Liam Girdwood <lgirdwood@gmail.com>
 M:	Mark Brown <broonie@opensource.wolfsonmicro.com>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
 L:	alsa-devel@alsa-project.org (moderated for non-subscribers)