drm/xe: Add dma_addr res cursor

Add dma_addr res cursor which walks an array of drm_pagemap_dma_addr.
Useful for SVM ranges and programing page tables.

v3:
 - Better commit message (Thomas)
 - Use new drm_pagemap.h location
v7:
 - Fix kernel doc (CI)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250306012657.3505757-11-matthew.brost@intel.com