imx6: add Bachmann OT1200 board

This patch adds support for the OT1200 series of devices.

Following components are used in u-boot:
+ ethernet
+ i2c
+ emmc
+ gpio

For more details see README.

Changes v1 > v2
  - make use of enable_cspi_clock(..)
  - fix usage of OUTPUT_40OHM define
  - added README

Changes v2 > v3
  - improve spelling in README
  - added own copy of mx6q_4x_mt41j128.cfg

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 106aed9..8face21 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -414,6 +414,9 @@
 config TARGET_TQMA6
 	bool "TQ Systems TQMa6 board"
 
+config TARGET_OT1200
+	bool "Bachmann OT1200"
+
 config OMAP34XX
 	bool "OMAP34XX SoC"
 
@@ -577,6 +580,7 @@
 source "board/atmel/at91sam9x5ek/Kconfig"
 source "board/atmel/sama5d3_xplained/Kconfig"
 source "board/atmel/sama5d3xek/Kconfig"
+source "board/bachmann/ot1200/Kconfig"
 source "board/balloon3/Kconfig"
 source "board/barco/titanium/Kconfig"
 source "board/bluegiga/apx4devkit/Kconfig"