This reverts commit 1837825e.

As reported by Michal Kubecek, the backport of commit 89c22d8c
("net: Fix skb csum races when peeking") exposed an upstream bug.
It is being reverted and replaced by a better fix.
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>