net: wl12xx: do not use kfree'd memory

wl1271_dump() uses cmd after kfree(cmd). Move kfree() just after
wl1271_dump().

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Acked-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_spi.c

@@ -160,9 +160,8 @@ static void wl1271_spi_init(struct wl1271 *wl)
 	spi_message_add_tail(&t, &m);
 
 	spi_sync(wl_to_spi(wl), &m);
-	kfree(cmd);
-
 	wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
+	kfree(cmd);
 }
 
 #define WL1271_BUSY_WORD_TIMEOUT 1000