V4L/DVB (7575a): Revert changeset 4c3b01f7

Due to the patch order change, pvrusb2 were broken. So, changeset
4c3b01f7 were applied at mainstream to fix.
After the pvrusb2 changes, this patch is no longer required and should be
reverted.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>