libertas: fix spelling mistake "Donwloading" -> "Downloading"

There is are two spelling mistakes in lbtf_deb_usb2 messages, fix these.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

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

@@ -368,7 +368,7 @@ static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
 			     cardp->fwseqnum, cardp->totalbytes);
 	} else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
 		lbs_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
-		lbs_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");
+		lbs_deb_usb2(&cardp->udev->dev, "Downloading FW JUMP BLOCK\n");
 
 		cardp->fwfinalblk = 1;
 	}

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

@@ -319,7 +319,7 @@ static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
 	} else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
 		lbtf_deb_usb2(&cardp->udev->dev,
 			"Host has finished FW downloading\n");
-		lbtf_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");
+		lbtf_deb_usb2(&cardp->udev->dev, "Downloading FW JUMP BLOCK\n");
 
 		/* Host has finished FW downloading
 		 * Donwloading FW JUMP BLOCK