[MOVED FROM BAD 37/56] gst/deinterlace2/tvtime/vfir.c: Implement the VFIR deinterlacing method as simple method.

Original commit message from CVS:
* gst/deinterlace2/tvtime/vfir.c: (deinterlace_line_c),
(deinterlace_line_mmx), (gst_deinterlace_method_vfir_class_init):
Implement the VFIR deinterlacing method as simple method.