board/liteboard: Add support for liteBoard

liteBoard is a development board which uses liteSOM as its base.

Hardware specification:
 * liteSOM (i.MX6UL, DRAM, eMMC)
 * Ethernet PHY (id 0)
 * USB host (usb_otg1)
 * MicroSD slot (uSDHC1)

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
diff --git a/board/grinn/liteboard/MAINTAINERS b/board/grinn/liteboard/MAINTAINERS
new file mode 100644
index 0000000..b4474f1
--- /dev/null
+++ b/board/grinn/liteboard/MAINTAINERS
@@ -0,0 +1,6 @@
+LITEBOARD
+M:	Marcin Niestroj <m.niestroj@grinn-global.com>
+S:	Maintained
+F:	board/grinn/liteboard/
+F:	include/configs/liteboard.h
+F:	configs/liteboard_defconfig