rapidio: Add support for Axxia AXM55xx and AXM56xx

commit c63302c4 from
https://github.com/axxia/linux-yocto.git

 v5.10/standard/axxia-dev/base.

Added support for sRIO hardware (RapidIO controller Revisions v1.0 to
v1.2) in Axxia AXM55xx and AXM56xx chips.

Configuration of link and response timeout values, output log messages.
The Device revision is identified from the  RapidIO Device Information
Capability Register (dicar).

Implemented the Link Down Monitor handler. The link down monitor resets
the interface, the handler waits for the link to go up.

The SRIO mport driver supports local and remote configuration register
access, Direct IO and Messaging transactions for all the Axxia AXM
chipset (AXM55xx and X9/AXM56xx) variants.

Signed-off-by: John Jacques <john.jacques@intel.com>
Signed-off-by: Palani <palaniappan.ramanathan@intel.com>
Signed-off-by: Charlie Paul <charlie.paul@windriver.com>
Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>