Revert "UPSTREAM: tcp: pad TLP using min(tp->mdev_us, 2ms) instead of 2ms"

This reverts commit 136b8916a25f0bf056d761b59cb0cf5a8bee0282.

Reason for revert: b/308472523#comment30

Change-Id: I4205445fcd7e64673108ccda7af05c2e06c4d670
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/60797
Tested-by: Brian Vazquez <brianvv@google.com>
Reviewed-by: Brian Vazquez <brianvv@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>