Revert "ipvlan: properly track tx_errors"

This reverts commit 9954a7f3 which is
commit ff672b9f upstream.

It breaks the build as an ABI-breaking change was reverted before this.
if this is needed, it can be brought back in an abi-safe way, but as
Android does not use the ipvlan code, it's probably not needed.

Bug: 161946584
Change-Id: I7e053b55bea4cac028ed7d65516a886d29c0476d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>