Support for the MX31ADS evaluation board from Freescale

This patch adds support for the MX31ADS evaluation board from Freescale,
initialization code is copied from RedBoot sources, also provided by
Freescale.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
diff --git a/board/mx31ads/config.mk b/board/mx31ads/config.mk
new file mode 100644
index 0000000..d34dc02
--- /dev/null
+++ b/board/mx31ads/config.mk
@@ -0,0 +1 @@
+TEXT_BASE = 0x87f00000