MAINTAINERS: drm: fsl-dcu: Update to Alison's NXP email address

The freescale.com email domain is not valid anymore, so use
the nxp.com domain instead.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>

MAINTAINERS

@@ -4665,7 +4665,7 @@ F:	Documentation/devicetree/bindings/display/exynos/
 
 DRM DRIVERS FOR FREESCALE DCU
 M:	Stefan Agner <stefan@agner.ch>
-M:	Alison Wang <alison.wang@freescale.com>
+M:	Alison Wang <alison.wang@nxp.com>
 L:	dri-devel@lists.freedesktop.org
 S:	Supported
 F:	drivers/gpu/drm/fsl-dcu/