Add type-3 device configuration overview that explains the probe
process for a type-3 device from early-boot through memory-hotplug.
Signed-off-by: Gregory Price <gourry@gourry.net>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20250512162134.3596150-8-gourry@gourry.net
Signed-off-by: Dave Jiang <dave.jiang@intel.com>