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/ldpaa_eth/ldpaa_eth.c b/drivers/net/ldpaa_eth/ldpaa_eth.c
index 69530b1..3857122 100644
--- a/drivers/net/ldpaa_eth/ldpaa_eth.c
+++ b/drivers/net/ldpaa_eth/ldpaa_eth.c
@@ -628,11 +628,11 @@
 #endif
 
 	memset(&dpmac_endpoint, 0, sizeof(struct dprc_endpoint));
-	sprintf(dpmac_endpoint.type, "dpmac");
+	strcpy(dpmac_endpoint.type, "dpmac");
 	dpmac_endpoint.id = priv->dpmac_id;
 
 	memset(&dpni_endpoint, 0, sizeof(struct dprc_endpoint));
-	sprintf(dpni_endpoint.type, "dpni");
+	strcpy(dpni_endpoint.type, "dpni");
 	dpni_endpoint.id = dflt_dpni->dpni_id;
 
 	err = dprc_connect(dflt_mc_io, MC_CMD_NO_FLAGS,