[PATCH v2] net/iavf: fix compilation warnings

[Gao, DaxueX]

> -----Original Message-----
> From: Zeng, ZhichaoX <zhichaox.zeng at intel.com>
> Sent: 2023年6月9日 17:03
> To: dev at dpdk.org
> Cc: Zhang, Qi Z <qi.z.zhang at intel.com>; Gao, DaxueX
> <daxuex.gao at intel.com>; Zeng, ZhichaoX <zhichaox.zeng at intel.com>;
> Richardson, Bruce <bruce.richardson at intel.com>; Konstantin Ananyev
> <konstantin.v.ananyev at yandex.ru>; Wu, Jingjing <jingjing.wu at intel.com>; Xing,
> Beilei <beilei.xing at intel.com>; Wu, Wenjun1 <wenjun1.wu at intel.com>
> Subject: [PATCH v2] net/iavf: fix compilation warnings
> 
> Use fallthrough comments to ignore compilation warnings instead of diagnostic
> pragmas, which are not recognized by old GCC(below GCC7).
> 
> Fixes: 95a1b0b23140 ("net/iavf: support Rx timestamp offload on SSE")
> Fixes: 4f58266da4d3 ("net/iavf: support Rx timestamp offload on AVX2")
> Fixes: d65eadb9e178 ("net/iavf: support Rx timestamp offload on AVX512")
> Signed-off-by: Zhichao Zeng <zhichaox.zeng at intel.com>
Tested-by: Daxue Gao <daxuex.gao at intel.com>