Add initial support for Freescale mx51evk board

The patch adds initial support for the Freescale mx51evk board.
Network (FEC) and SD controller (fsl_esdhc) are supported.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Fred Fan <fanyefeng@gmail.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index dd1579e..160f580 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -150,6 +150,10 @@
 
 	SXNI855T	MPC8xx
 
+Fred Fan <fanyefeng@gmail.com>
+
+	mx51evk		i.MX51
+
 Thomas Frieden <ThomasF@hyperion-entertainment.com>
 
 	AmigaOneG3SE	MPC7xx