rtlwifi: Set retry limit depends on vif type.

We assign different retry limit according to vif type, because
it can boost performance in field.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: shaofu <shaofu@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>