swap SPI_CLK_M2 and SPI_CSN0_M2

[GaryLa]

Ok, that's what I was doing. I misinterpreted what you were saying about the device tree.

I thought you found some way of using the CSN0_M2 select for your own purposes.

I'm obviously not understanding something... If you're not using CSN0_M2 for your own chip select, and you're using an unrelated GPIO, then why bother disabling the on-board flash?

It if doesn't get selected, it tri-states MISO and other than the pull-ups on the Rock64, it is invisible.