Revert "media: media/pci: rename VFL_TYPE_GRABBER to _VIDEO"

This reverts commit 353f980a which is
commit 3e30a927af3ca86f6556faf437da44ca8bcf54a4 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I0f232d107f44e0a75b336e54191513bd2ec8c676
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>