drm/i915/ttm: fixup build failure

drm-intel-gt-next fails to build with:

drivers/gpu/drm/i915/gem/i915_gem_ttm.c: In function ‘vm_fault_ttm’:
drivers/gpu/drm/i915/gem/i915_gem_ttm.c:862:23: error: too many arguments to function ‘ttm_bo_vm_fault_reserved’
  862 |                 ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot,
      |                       ^~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211123125814.1703220-1-matthew.auld@intel.com

drivers/gpu/drm/i915/gem/i915_gem_ttm.c

@@ -860,7 +860,7 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf)
 
 	if (drm_dev_enter(dev, &idx)) {
 		ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot,
-					       TTM_BO_VM_NUM_PREFAULT, 1);
+					       TTM_BO_VM_NUM_PREFAULT);
 		drm_dev_exit(idx);
 	} else {
 		ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot);