board/sunxi/MAINTAINERS: Add new defconfigs

Add entries for the recently added defconfig files. I had thought I had
committed these updates but lost them before pushing the branch.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index f556857..a2da6a4 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -348,6 +348,11 @@
 S:	Maintained
 F:	configs/libretech_all_h5_cc_h5_defconfig
 
+NANOPI DUO2 BOARD
+M:	Chuanhong Guo <gch981213@gmail.com>
+S:	Maintained
+F:	configs/nanopi_duo2_defconfig
+
 NANOPI-M1 BOARD
 M:	Mylène Josserand <mylene.josserand@free-electrons.com>
 S:	Maintained
@@ -550,6 +555,11 @@
 S:	Maintained
 F:	configs/tbs_a711_defconfig
 
+TRANSPEED 8K618-T BOARD
+M:	Nick Alilovic <nickalilovic@gmail.com>
+S:	Maintained
+F:	configs/transpeed-8k618-t_defconfig
+
 WEXLER-TAB7200 BOARD
 M:	Aleksei Mamlin <mamlinav@gmail.com>
 S:	Maintained