wl12xx/sdio_test.c: fix build breakage from WL127X_FW_NAME change

Commit c302b2c9 ("wl12xx: Use a single
fw for both STA and AP roles") changed the name of the firmware name
definition, breaking the build of wl12xx/sdio_test.c.
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/sdio_test.c

@@ -193,7 +193,7 @@ static int wl1271_fetch_firmware(struct wl1271 *wl)
 		ret = request_firmware(&fw, WL128X_FW_NAME,
 				       wl1271_wl_to_dev(wl));
 	else
-		ret = request_firmware(&fw, WL1271_FW_NAME,
+		ret = request_firmware(&fw, WL127X_FW_NAME,
 				       wl1271_wl_to_dev(wl));
 
 	if (ret < 0) {