Merge branch 'for-7.0/cxl-aer-prep' into cxl-for-next

Merge branch 'for-7.0/cxl-aer-prep' into cxl-for-next

Fixup and refactor downstream port enumeration to prepare for CXL port
protocol error handling. Main motivation is to move endpoint
component register mapping to a port object.

cxl/port: Unify endpoint and switch port lookup
cxl/port: Move endpoint component register management to cxl_port
cxl/port: Map Port RAS registers
cxl/port: Move dport RAS setup to dport add time
cxl/port: Move dport probe operations to a driver event
cxl/port: Move decoder setup before dport creation
cxl/port: Cleanup dport removal with a devres group
cxl/port: Reduce number of @dport variables in cxl_port_add_dport()
cxl/port: Cleanup handling of the nr_dports 0 -> 1 transition