Fix compile errors in SGI console drivers (linux-next tree)

The below is the patch to replace blindly all possible places,
including Jack's fixes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
(Reviewed and checked rather than blindly added)
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index efc971d..3612607 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -732,7 +732,7 @@
 static inline int
 mpc52xx_uart_int_rx_chars(struct uart_port *port)
 {
-	struct tty_struct *tty = port->info->tty;
+	struct tty_struct *tty = port->info->port.tty;
 	unsigned char ch, flag;
 	unsigned short status;