rockchip: Add basic support for evb-rv1108 board

Add basic support for rv1108 evb, whith this patch we
can boot into u-boot console.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/rockchip/evb_rv1108/MAINTAINERS b/board/rockchip/evb_rv1108/MAINTAINERS
new file mode 100644
index 0000000..94def32
--- /dev/null
+++ b/board/rockchip/evb_rv1108/MAINTAINERS
@@ -0,0 +1,6 @@
+EVB-RV1108
+M:      Andy Yan <andy.yan@rock-chips.com>
+S:      Maintained
+F:      board/rockchip/evb_rv1108
+F:      include/configs/evb_rv1108.h
+F:      configs/evb-rv1108_defconfig