Serial: ifx6x60c: Remove duplicate includes of linux/tty.h

Including linux/tty.h 3 times is a little over the top - once will do.
Signed-off-by: NJesper Juhl <jj@chaosbits.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/tty/serial/ifx6x60.c

@@ -41,7 +41,6 @@
 #include <linux/tty.h>
 #include <linux/device.h>
 #include <linux/spi/spi.h>
-#include <linux/tty.h>
 #include <linux/kfifo.h>
 #include <linux/tty_flip.h>
 #include <linux/timer.h>
@@ -56,7 +55,6 @@
 #include <linux/sched.h>
 #include <linux/time.h>
 #include <linux/wait.h>
-#include <linux/tty.h>
 #include <linux/pm.h>
 #include <linux/pm_runtime.h>
 #include <linux/spi/ifx_modem.h>