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/arch/arm/cpu/armv7/mx6/Kconfig b/arch/arm/cpu/armv7/mx6/Kconfig
index 8b2217e..a81d944 100644
--- a/arch/arm/cpu/armv7/mx6/Kconfig
+++ b/arch/arm/cpu/armv7/mx6/Kconfig
@@ -200,6 +200,10 @@
 	bool "udoo"
 	select SUPPORT_SPL
 
+config TARGET_UDOO_NEO
+	bool "UDOO Neo"
+	select SUPPORT_SPL
+
 config TARGET_WANDBOARD
 	bool "wandboard"
 	select SUPPORT_SPL
@@ -261,6 +265,7 @@
 source "board/tbs/tbs2910/Kconfig"
 source "board/tqc/tqma6/Kconfig"
 source "board/udoo/Kconfig"
+source "board/udoo/neo/Kconfig"
 source "board/wandboard/Kconfig"
 source "board/warp/Kconfig"