MX51: Update responsible for mx51evk

Signed-off-by: Stefano Babic <sbabic@denx.de>

MAINTAINERS

@@ -152,10 +152,6 @@ Dave Ellis <DGE@sixnetio.com>
 
 	SXNI855T	MPC8xx
 
-Fred Fan <fanyefeng@gmail.com>
-
-	mx51evk		i.MX51
-
 Thomas Frieden <ThomasF@hyperion-entertainment.com>
 
 	AmigaOneG3SE	MPC7xx
@@ -549,6 +545,7 @@ Stefano Babic <sbabic@denx.de>
 
 	polaris		xscale
 	trizepsiv	xscale
+	mx51evk		i.MX51
 
 Dirk Behme <dirk.behme@gmail.com>