msm_geni_serial: skip flushing tx upon shutdown

This is causing runtime PM to malfunction and prevents suspend indefinitely.

This might be HAL related, but since flushing data by manually powering on
the serial is unnecessary upon shutdown, skip it instead.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Author: arter97

drivers/tty/serial/msm_geni_serial.c

@@ -2213,8 +2213,6 @@ static void msm_geni_serial_shutdown(struct uart_port *uport)
 		console_stop(uport->cons);
 		disable_irq(uport->irq);
 	} else {
-		msm_geni_serial_power_on(uport);
-		wait_for_transfers_inflight(uport);
 		msm_geni_serial_stop_tx(uport);
 	}