Merge branch 'bpf-remove-xdp_do_flush_map'

Sebastian Andrzej Siewior says:

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bpf: Remove xdp_do_flush_map().

I had #1 split in several patches per vendor and then decided to merge
it. I can repost it with one patch per vendor if this preferred.
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Link: https://lore.kernel.org/r/20230908143215.869913-1-bigeasy@linutronix.de


Signed-off-by: Jakub Kicinski <kuba@kernel.org>