staging/easycap: There is no need to support V4L1 ioctls

Because V4L1 was completly removed from the kernel in 2.6.38. See e.g.

08af245d ([media] V4L: remove V4L1 compatibility mode).

Cc: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>