Revert "media: rename VFL_TYPE_GRABBER to _VIDEO"

This reverts commit fa83fca5 which is
commit 238e4a5b 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: Ic404ca639db1ad734323929e0f000b3ee6bb5f1d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>