[SPI Ethernet] Fix concurrency issue with shared SPI bus for ETH/display #4961
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SPI Ethernet does do funky stuff with initializing the SPI bus. It must be exclusive on that bus, or being handed an already initialized SPI bus for `ETH.begin()`
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SPI Ethernet does do funky stuff with initializing the SPI bus. It must be exclusive on that bus, or being handed an already initialized SPI bus for
ETH.begin()