fpga: m10bmc-sec: change contact for secure update driver

Change the maintainer for the Intel MAX10 BMC Secure Update driver from
Peter Colberg to Matthew Gerlach and update the ABI documentation.

Signed-off-by: Peter Colberg <peter.colberg@altera.com>
Acked-by: Matthew Gerlach <matthew.gerlach@altera.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20250317210136.72816-1-peter.colberg@altera.com


Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>