Recent SPI fix causes SPI0 to be disabled on every reboot

[DanCrank]

This appears to be disabling whichever SPI bus the OLED isn't using, in app.py:

# Configure Raspberry Pi with correct bus
self._interface_manager.spi0 = spi_bus == 0
self._interface_manager.spi1 = spi_bus == 1

By default, since the OLED is using SPI1, this causes SPI0 to be disabled every time the Pi is rebooted. I'm working around this with a startup service that runs after pi-topd to turn it back on, but it's a bit of an inconvenience and it took me a bit to figure out what was happening.

Is disabling the "other" SPI bus an essential part of the fix? Is there a better workaround that I'm missing?

Thanks,
Dan