libertas_tf: Fix wrong function name in comments

Fixes the following W=1 kernel build warning(s):

 drivers/net/wireless/marvell/libertas_tf/if_usb.c:56: warning: expecting prototype for if_usb_wrike_bulk_callback(). Prototype was for if_usb_write_bulk_callback() instead
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210517050141.61488-8-shenyang39@huawei.com

drivers/net/wireless/marvell/libertas_tf/if_usb.c

@@ -48,7 +48,7 @@ static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
 static int if_usb_reset_device(struct lbtf_private *priv);
 
 /**
- *  if_usb_wrike_bulk_callback -  call back to handle URB status
+ *  if_usb_write_bulk_callback -  call back to handle URB status
  *
  *  @urb:		pointer to urb structure
  */