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/Kconfig b/board/grinn/liteboard/Kconfig
new file mode 100644
index 0000000..e035872
--- /dev/null
+++ b/board/grinn/liteboard/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_LITEBOARD
+
+config SYS_BOARD
+	default "liteboard"
+
+config SYS_VENDOR
+	default "grinn"
+
+config SYS_CONFIG_NAME
+	default "liteboard"
+
+endif