cxl/core/regs: Add @dev to cxl_register_map

The corresponding device of a register mapping is used for devm
operations and logging. For operations with struct cxl_register_map
the device needs to be kept track separately. To simpify the involved
function interfaces, add @dev to cxl_register_map.

While at it also reorder function arguments of cxl_map_device_regs()
and cxl_map_component_regs() to have the object @cxl_register_map
first.

As a result a bunch of functions are available to be used with a
@cxl_register_map object.

This patch is in preparation of reworking the component register setup
code.

Signed-off-by: Robert Richter <[email protected]>
Signed-off-by: Terry Bowman <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dan Williams <[email protected]>

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