sunxi: Add Libre Computer Board ALL-H3-CC H2+ ver.

This patch adds a device tree file for the H2+ version of the Libre
Computer Board ALL-H3-CC. It is the same board first introduced in
commit afe27544125e ("sunxi: Add support for Libre Computer Board
ALL-H3-CC H3 ver."), with the H3 SoC replaced with the H2+ SoC, and
has only two 2Gb DDR3 chips instead of four.

The device tree utilizes the common board design file for ALL-H3-CC,
providing just the model strings and SoC specifics.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 6dd48c0..4c21a2f 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -266,9 +266,10 @@
 S:	Maintained
 F:	configs/MSI_Primo81_defconfig
 
-LIBRETECH ALL-H3-CC H3 BOARD
+LIBRETECH ALL-H3-CC BOARDS
 M:	Chen-Yu Tsai <wens@csie.org>
 S:	Maintained
+F:	configs/libretech_all_h3_cc_h2_plus_defconfig
 F:	configs/libretech_all_h3_cc_h3_defconfig
 
 NANOPI-M1 BOARD