Revert "can: af_can: fix NULL pointer dereference in can_rcv_filter"

This reverts commit 39826529 which is
commit 0acc4423 upstream.

It is fixing a commit that was reverted from the Android tree due to it
breaking the ABI, so it is not needed here at all.  Revert it now as it
breaks the build.

Fixes: 39826529 ("can: af_can: fix NULL pointer dereference in can_rcv_filter")
Change-Id: I049aff8719673d31da9429579162d0aa1025834e
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>