MAINTAINERS: Add Nicholas Chin for all Dell Latitudes

All of the Dell Latitudes from GM45 and until at least Haswell use a
derivative of the MEC5035 EC, and I have been actively working on
coreboot support for this EC and boards that use it. Rename the "E6400
MAINBOARD" section to "DELL LATITUDE" and add mb/dell/snb_ivb_latitude
and mb/dell/e7240 as additional paths.

Change-Id: I7ba46980bfc8569a85593e415f01cc83fe7d67d7
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83008
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8ed9b4b..af1cb51 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -263,11 +263,12 @@
 S:	Orphan
 F:	src/mainboard/dell/
 
-DELL E6400 MAINBOARD
+DELL LATITUDE MAINBOARDS
 M:	Nicholas Chin <nic.c3.14@gmail.com>
 S:	Maintained
 F:	src/mainboard/dell/e6400/
-
+F:	src/mainboard/dell/snb_ivb_latitude/
+F:	src/mainboard/dell/e7240/
 
 
 EMULATION MAINBOARDS