mx6sx: Add initial support for UDOO Neo Board

UDOO Neo Board is a development board from Seco that has three models:
 - UDOO Neo Basic
 - UDOO Neo Basic Kick Starter
 - UDOO Neo Extended
 - UDOO Neo Full

All versions are based on the i.MX6 SoloX processor.

For more details about the UDOO Neo board, please refer to:
http://www.udoo.org/udoo-neo/

This work is based on a previous commit of Francesco Montefoschi
<francesco.monte@gmail.com>:
https://github.com/fmntf/u-boot/commit/877b71184a5105e708024f232d36aed574961844

Only tested on the UDOO Neo Full board.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/board/udoo/neo/MAINTAINERS b/board/udoo/neo/MAINTAINERS
new file mode 100644
index 0000000..743fe33
--- /dev/null
+++ b/board/udoo/neo/MAINTAINERS
@@ -0,0 +1,7 @@
+UDOO NEO BOARD
+M:	Breno Lima <breno.lima@nxp.com>
+M:	Francesco Montefoschi <francesco.montefoschi@udoo.org>
+S:	Maintained
+F:	board/udoo/neo/
+F:	include/configs/udoo_neo.h
+F:	configs/udoo_neo_defconfig