sata_via.c: Remove missleading comment.

Maybe for the trivial tree...

sata_via.c has PATA support since:

  d73f30e1

  sata_via: PATA support

AFAICS so the TODO list is no longer true.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/ata/sata_via.c

@@ -30,8 +30,6 @@
  *  Hardware documentation available under NDA.
  *
  *
- *  To-do list:
- *  - VT6421 PATA support
  *
  */