MAINTAINERS: Update email address for Maxime Ripard

Free Electrons is no more and is now known as Bootlin, change my email
address accordingly.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 0aecc18..be941c1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -205,7 +205,7 @@
 
 ARM SUNXI
 M:	Jagan Teki <jagan@openedev.com>
-M:	Maxime Ripard <maxime.ripard@free-electrons.com>
+M:	Maxime Ripard <maxime.ripard@bootlin.com>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-sunxi.git
 F:	arch/arm/cpu/armv7/sunxi/