Revert "net/packet: fix overflow in tpacket_rcv"

This reverts commit 901f5dd4e51c5637e961f4217aba5e909e7eff5b.

Reason for revert: This change does not compile.

Change-Id: I065fc405ff27e317c3e79d43dc67bf3763d432ae
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/5042
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Robert Kolchmeyer <rkolchmeyer@google.com>