board: tuna: fix warnings.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
Linux v3.0.75

This is the 3.0.75 stable release

Conflicts:
	Makefile
	drivers/mtd/mtdchar.c
	fs/sysfs/dir.c
	kernel/cgroup.c
	kernel/signal.c
Linux v3.0.76

This is the 3.0.76 stable release

Conflicts:
	Makefile
	drivers/mtd/mtdchar.c
	fs/sysfs/dir.c
	kernel/cgroup.c
	kernel/signal.c
Linux v3.0.77

This is the 3.0.77 stable release

Conflicts:
	Makefile
	drivers/mtd/mtdchar.c
	drivers/tty/tty_io.c
	drivers/usb/serial/option.c
	drivers/video/console/fbcon.c
	fs/sysfs/dir.c
	kernel/cgroup.c
	kernel/signal.c
	kernel/time/tick-broadcast.c