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/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 681765b..5aace4d 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -309,8 +309,8 @@
 {
 	struct tty_struct *tty = vc->port.tty;
 
+	tty_insert_flip_char(&vc->port, ch, 0);
 	if (tty) {
-		tty_insert_flip_char(tty, ch, 0);
 		tty_schedule_flip(tty);
 	}
 }
@@ -323,7 +323,7 @@
 		return;
 
 	while (*cp) {
-		tty_insert_flip_char(tty, *cp, 0);
+		tty_insert_flip_char(&vc->port, *cp, 0);
 		cp++;
 	}
 	tty_schedule_flip(tty);
@@ -586,7 +586,7 @@
 
 	if (!tty)
 		return;
-	tty_insert_flip_char(tty, 0, TTY_BREAK);
+	tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
 	tty_schedule_flip(tty);
 }