spi_nxp_lpspi: Add version ID to data struct

Since I expect that the drivers will need to read this version ID maybe
multiple times, instead of repeatedly doing so over the peripheral bus,
it is probably worth it to store a byte in RAM representing this
version. The behavior of the LPSPI is fairly significantly different
between versions. Not enough to warrant separate drivers but enough to
need a few workarounds or different code branches depending on this.

Also, the interrupt based driver is currently using a wrong macro to
read this, and that is a bug.

Signed-off-by: Declan Snyder <declan.snyder@nxp.com>