netdev - ethtool: introducing "-D_POSIX_C_SOURCE=200809L" breaks compilation with OpenWrt

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Message-ID: <0723288b-b465-25d4-5070-d8aa80828b11@systemli.org>
Date:   Tue, 27 Dec 2022 16:23:12 +0100
From:   Nick <vincent@...temli.org>
To:     netdev@...r.kernel.org
Subject: ethtool: introducing "-D_POSIX_C_SOURCE=200809L" breaks compilation
 with OpenWrt

Commit 1fa60003a8b8 ("misc: header includes cleanup") [0] introduces 
"-D_POSIX_C_SOURCE=200809L".
However, this breaks compilation with OpenWrt resulting in following error:

> marvell.c: In function 'dump_queue':
> marvell.c:34:17: error: unknown type name 'u_int32_t'
>    34 |                 u_int32_t               ctl;
>       |                 ^~~~~~~~~
Not sure, why the code uses u_int32_t.

Bests
Nick

[0] - 
https://git.kernel.org/pub/scm/network/ethtool/ethtool.git/commit/?id=1fa60003a8b8fa25d783867967860656f593822e