Fix GCC format-security errors and convert sprintfs.

With format-security errors turned on, GCC picks up the use of sprintf with
a format parameter not being a string literal.

Simple uses of sprintf are also converted to use strcpy.

Signed-off-by: Ben Whitten <ben.whitten@gmail.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/net/ne2000_base.c b/drivers/net/ne2000_base.c
index 07a7cec..887cfd9 100644
--- a/drivers/net/ne2000_base.c
+++ b/drivers/net/ne2000_base.c
@@ -794,7 +794,7 @@
 	dev->send = ne2k_send;
 	dev->recv = ne2k_recv;
 
-	sprintf(dev->name, "NE2000");
+	strcpy(dev->name, "NE2000");
 
 	return eth_register(dev);
 }