mwifiex: do not print dot when downloading FW

Printing about 3000 lines like this

[   20.691850] mwifiex_pcie 0000:02:00.0: .
[   20.693466] mwifiex_pcie 0000:02:00.0: .

is not useful. If FW downloading will be interrupted, we will get
proper error message about that.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/pcie.c

@@ -1956,8 +1956,6 @@ static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 			if (firmware_len - offset < txlen)
 				txlen = firmware_len - offset;
 
-			mwifiex_dbg(adapter, INFO, ".");
-
 			tx_blocks = (txlen + card->pcie.blksz_fw_dl - 1) /
 				    card->pcie.blksz_fw_dl;