serial: bfin-uart: Fix auto CTS

Commit 64851636,
serial: bfin-uart: Remove ASYNC_CTS_FLOW flag for hardware automatic CTS,
open-codes uart_handle_cts_change() when CONFIG_SERIAL_BFIN_HARD_CTSRTS
to skip start and stop tx.

But the CTS interrupt handler _still_ calls uart_handle_cts_change();
only call uart_handle_cts_change() if !CONFIG_SERIAL_BFIN_HARD_CTSRTS.

cc: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/bfin_uart.c

@@ -122,8 +122,9 @@ static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id)
 		if (!status)
 			uport->hw_stopped = 1;
 	}
-#endif
+#else
 	uart_handle_cts_change(uport, status & TIOCM_CTS);
+#endif
 
 	return IRQ_HANDLED;
 }