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/ftgmac100.c b/drivers/net/ftgmac100.c
index 515f0b2..5ccc4be 100644
--- a/drivers/net/ftgmac100.c
+++ b/drivers/net/ftgmac100.c
@@ -562,7 +562,7 @@
 	memset(dev, 0, sizeof(*dev));
 	memset(priv, 0, sizeof(*priv));
 
-	sprintf(dev->name, "FTGMAC100");
+	strcpy(dev->name, "FTGMAC100");
 	dev->iobase	= CONFIG_FTGMAC100_BASE;
 	dev->init	= ftgmac100_init;
 	dev->halt	= ftgmac100_halt;