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redpine: Revert interrupt handler patches

Sebastian Krzyszkowiak requested to merge sebastian.krzyszkowiak/linux-next:redpine-irq-byz into pureos/byzantium

These patches have been taken from the mainline driver where they were supposed to improve the performance by lowering the CPU overhead, but it seems like they actually have opposite effect for us - at least on this version of the driver.

I think I've missed that because the old driver also had similarly poor performance for me, and I applied those patches on top of the new driver already before I tried the new driver for the first time 🤦

Thanks @elias for figuring this out! I think it's the first time I see it hitting 40Mbps speeds \o/

Fixes #285 (closed) and #286 (closed)

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