GCC4.6: Squash error in cpc45/pd67290.c

pd67290.c: In function 'cirrus_set_opts':
pd67290.c:282: error: 'buf' undeclared (first use in this function)
pd67290.c:282: error: (Each undeclared identifier is reported only once
pd67290.c:282: error: for each function it appears in.)

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Mike Frysinger <vapier@gentoo.org>

board/cpc45/pd67290.c

@@ -225,11 +225,7 @@ static u_int cirrus_set_opts (socket_info_t * s)
 {
 	cirrus_state_t *p = &s->c_state;
 	u_int mask = 0xffff;
-#if DEBUG
-	char buf[200];
-
-	memset (buf, 0, 200);
-#endif
+	char buf[200] = {0};
 
 	if (has_ring == -1)
 		has_ring = 1;