fsi: Move defines to common header

The FSI master registers are common to the hub and AST2600 master (and
the FSP2, if someone was to upstream a driver for that).

Add defines to the fsi-master.h header, and introduce headings to
delineate the existing low level details.

Acked-by: Andrew Jeffery <[email protected]>
Acked-by: Jeremy Kerr <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
2 files changed