drm/xe: Add (re)bind to SVM page fault handler

drm/xe: Add (re)bind to SVM page fault handler

Add (re)bind to SVM page fault handler. To facilitate add support
function to VM layer which (re)binds a SVM range. Also teach PT layer to
understand (re)binds of SVM ranges.

v2:
 - Don't assert BO lock held for range binds
 - Use xe_svm_notifier_lock/unlock helper in xe_svm_close
 - Use drm_pagemap dma cursor
 - Take notifier lock in bind code to check range state
v3:
 - Use new GPU SVM range structure (Thomas)
 - Kernel doc (Thomas)
 - s/DRM_GPUVA_OP_USER/DRM_GPUVA_OP_DRIVER (Thomas)
v5:
 - Kernel doc (Thomas)
v6:
 - Only compile if CONFIG_DRM_GPUSVM selected (CI, Lucas)

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Tested-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250306012657.3505757-15-matthew.brost@intel.com