TTY: switch tty_insert_flip_char

Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty in many
call sites. Only tty_port will needed and hence no more
tty_port_tty_get in those paths.

tty_insert_flip_char is the next one to proceed. This one is used all
over the code, so the patch is huge.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index ed047d9..7a23786 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -513,7 +513,7 @@
 				continue;
 
 error_return:
-			tty_insert_flip_char(tty, ch, flg);
+			tty_insert_flip_char(tport, ch, flg);
 
 		}
 
@@ -561,7 +561,7 @@
 
 	/* Overrun does not affect the current character ! */
 	if (status & BD_SC_OV)
-		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+		tty_insert_flip_char(tport, 0, TTY_OVERRUN);
 #ifdef SUPPORT_SYSRQ
 	port->sysrq = 0;
 #endif