Revert "ANDROID: tty: serdev: Fix broken serial console input"

We don't need this any more as devices which are consoles and also
platform devices are automatically excluded from binding unless the user
opts into it.

This reverts commit 2fdad105a0.

Bug: 146517987
Change-Id: I2b9cc9c13870e5ecccbf04addadd48e59658aee3
Signed-off-by: Alistair Delva <adelva@google.com>

drivers/tty/serdev/serdev-ttyport.c

@@ -279,11 +279,6 @@ struct device *serdev_tty_port_register(struct tty_port *port,
 	if (!port || !drv || !parent)
 		return ERR_PTR(-ENODEV);
 
-	if (port->console) {
-		/* can't convert tty's that are already in use */
-		return ERR_PTR(-ENODEV);
-	}
-
 	ctrl = serdev_controller_alloc(parent, sizeof(struct serport));
 	if (!ctrl)
 		return ERR_PTR(-ENOMEM);