hvcs: Use vhangup in hotplug remove

When hotplug removing an hvcs device, we need to ensure the
hangup processing is done prior to exiting the remove function,
so use tty_vhangup to do the hangup processing directly
rather than using tty_hangup which simply schedules the hangup
work for later execution.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Link: https://lore.kernel.org/r/20230203155802.404324-5-brking@linux.vnet.ibm.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/hvc/hvcs.c

@@ -810,12 +810,11 @@ static void hvcs_remove(struct vio_dev *dev)
 	tty_port_put(&hvcsd->port);
 
 	/*
-	 * The hangup is a scheduled function which will auto chain call
-	 * hvcs_hangup.  The tty should always be valid at this time unless a
+	 * The tty should always be valid at this time unless a
 	 * simultaneous tty close already cleaned up the hvcs_struct.
 	 */
 	if (tty) {
-		tty_hangup(tty);
+		tty_vhangup(tty);
 		tty_kref_put(tty);
 	}