ARM: dts: Update Javier Martinez Canillas's email

I see that people are still sending emails to my old address (that no
longer exists) since is the one mentioned in the IGEP DTS. Replace it
with my current email address to avoid this.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>