accel/qaic: Add crashdump to Sahara

The Sahara protocol has a crashdump functionality. In the hello
exchange, the device can advertise it has a memory dump available for
the host to collect. Instead of the device making requests of the host,
the host requests data from the device which can be later analyzed.

Implement this functionality and utilize the devcoredump framework for
handing the dump over to userspace.

Similar to how firmware loading in Sahara involves multiple files,
crashdump can consist of multiple files for different parts of the dump.
Structure these into a single buffer that userspace can parse and
extract the original files from.

Reviewed-by: Carl Vanderlip <[email protected]>
Signed-off-by: Jeffrey Hugo <[email protected]>
Reviewed-by: Bjorn Andersson <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: quic-jhugo