dm: at91: Add myself as maintainer for snapper9260

The old maintainer has left, so take this over.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/bluewater/snapper9260/MAINTAINERS b/board/bluewater/snapper9260/MAINTAINERS
index ff1e997..1f8f4d6 100644
--- a/board/bluewater/snapper9260/MAINTAINERS
+++ b/board/bluewater/snapper9260/MAINTAINERS
@@ -1,5 +1,5 @@
 SNAPPER9260 BOARD
-M:	Ryan Mallon <ryan@bluewatersys.com>
+M:	Simon Glass <sjg@chromium.org>
 S:	Maintained
 F:	board/bluewater/snapper9260/
 F:	include/configs/snapper9260.h