Revert "tcp: disable tcp_autocorking for socket when TCP_NODELAY flag is set"

This reverts commit f3f32a35.

Paolo reports that the change disables autocorking even after
the userspace sets TCP_CORK.

Fixes: f3f32a35

 ("tcp: disable tcp_autocorking for socket when TCP_NODELAY flag is set")
Link: https://lore.kernel.org/r/0d30d5a41d3ac990573016308aaeacb40a9dc79f.camel@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>