HSD #15010832611: firmware: stratix10-rsu: query spt addresses

commit ff347243f1a1c3927ba2ea1d9c30348c3939cd51 from
https://github.com/altera-opensource/linux-socfpga.git



Extend Intel Remote System Update (RSU) driver to get SPT
(Sub-Partition Table) addresses.

Signed-off-by: Radu Bacrau <radu.bacrau@intel.com>
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>