drm/xe/svm: Fix regression disallowing 64K SVM migration

When changing the condition from >= SZ_64K, it was changed to <= SZ_64K.
This disallows migration of 64K, which is the exact minimum allowed.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/5057
Fixes: a9ac0fa ("drm/xe: Strict migration policy for atomic SVM faults")
Cc: stable@vger.kernel.org
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Link: https://lore.kernel.org/r/20250521090102.2965100-1-dev@lankhorst.se

Author: Maarten Lankhorst

drivers/gpu/drm/xe/xe_svm.c

@@ -820,7 +820,7 @@ bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range, struct xe_vm
 		return false;
 	}
 
-	if (preferred_region_is_vram && range_size <= SZ_64K && !supports_4K_migration(vm->xe)) {
+	if (preferred_region_is_vram && range_size < SZ_64K && !supports_4K_migration(vm->xe)) {
 		drm_dbg(&vm->xe->drm, "Platform doesn't support SZ_4K range migration\n");
 		return false;
 	}