MAINTAINERS: change my DT related maintainer address

Filtering capabilities on my work email are pretty much non-existent and this
has turned out to be something of a firehose...

Cc: Stephen Warren <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Olof Johansson <[email protected]>
Cc: Linus Walleij <[email protected]>
Signed-off-by: Ian Campbell <[email protected]>
Acked-by: Pawel Moll <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8197fbd..b140c81 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6066,7 +6066,7 @@
 M:	Pawel Moll <[email protected]>
 M:	Mark Rutland <[email protected]>
 M:	Stephen Warren <[email protected]>
-M:	Ian Campbell <[email protected]>
+M:	Ian Campbell <[email protected]>
 L:	[email protected]
 S:	Maintained
 F:	Documentation/devicetree/