firmware: stratix10-rsu: query spt addresses

firmware: stratix10-rsu: query spt addresses

Extend Intel Remote System Update (RSU) driver to get SPT
(Sub-Partition Table) addresses. The query SPT address can be used
to determine if the RSU QSPI layout is 32kB or 64kB aligned.
The alignment can be determined by minus the upper with the lower of
the SPT addresses.

This patch depends on patch:
firmware: stratix10-svc: Generic Mailbox Command

Signed-off-by: Radu Bacrau <radu.bacrau@intel.com>
Signed-off-by: Kah Jing Lee <kah.jing.lee@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20230727192907.982070-2-dinguyen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>