MAINTAINERS: socfpga: update email address for Dinh Nguyen

With the acquisition of Altera by Intel, my Altera email may be going
away soon. Update the contact to a more reliable address.

Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
diff --git a/board/terasic/de0-nano-soc/MAINTAINERS b/board/terasic/de0-nano-soc/MAINTAINERS
index 351c456..7f4cf1e 100644
--- a/board/terasic/de0-nano-soc/MAINTAINERS
+++ b/board/terasic/de0-nano-soc/MAINTAINERS
@@ -1,5 +1,5 @@
 SOCFPGA ATLAS BOARD
-M:	Dinh Nguyen <dinguyen@opensource.altera.com>
+M:	Dinh Nguyen <dinguyen@kernel.org>
 S:	Maintained
 F:	include/configs/socfpga_de0_nano_soc.h
 F:	configs/socfpga_de0_nano_soc_defconfig