fsi: Use of_match_table for bus matching if specified

Since we have two scom drivers, use the standard of matching if
the driver specifies a table so that the right devices go to the
right driver.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20230612195657.245125-4-eajames@linux.ibm.com


Signed-off-by: Joel Stanley <joel@jms.id.au>