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>

include/configs/tam3517-common.h

@@ -384,7 +384,7 @@ do {								\
 		if (i)						\
 			sprintf(ethname, "eth%daddr", i);	\
 		else						\
-			sprintf(ethname, "ethaddr");		\
+			strcpy(ethname, "ethaddr");		\
 		printf("Setting %s from EEPROM with %s\n", ethname, buf);\
 		setenv(ethname, buf);				\
 	}							\