MAINTAINERS: platform/chrome: Add Enric as a maintainer

Enric has volunteered to help me with maintaining chrome-platform
as we change the development model toward strictly upstream-first for
any chrome-platform and cros_ec driver.
Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

MAINTAINERS

@@ -3549,6 +3549,7 @@ F:	drivers/input/touchscreen/chipone_icn8505.c
 
 CHROME HARDWARE PLATFORM SUPPORT
 M:	Benson Leung <bleung@chromium.org>
+M:	Enric Balletbo i Serra <enric.balletbo@collabora.com>
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform.git
 F:	drivers/platform/chrome/