drm/i915/selftests: allow misaligned_pin test work with unmappable memory

In case of Small BAR configurations stolen local memory can be unmappable.
Since the test does not touch the memory, passing I915_BO_ALLOC_GPU_ONLY
flag to i915_gem_object_create_region, will prevent -ENOSPC error from
_i915_gem_object_stolen_init.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6565Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220825154239.52343-1-andrzej.hajda@intel.com

drivers/gpu/drm/i915/selftests/i915_gem_gtt.c

@@ -1080,7 +1080,7 @@ static int misaligned_case(struct i915_address_space *vm, struct intel_memory_re
 	bool is_stolen = mr->type == INTEL_MEMORY_STOLEN_SYSTEM ||
 			 mr->type == INTEL_MEMORY_STOLEN_LOCAL;
 
-	obj = i915_gem_object_create_region(mr, size, 0, 0);
+	obj = i915_gem_object_create_region(mr, size, 0, I915_BO_ALLOC_GPU_ONLY);
 	if (IS_ERR(obj)) {
 		/* if iGVT-g or DMAR is active, stolen mem will be uninitialized */
 		if (PTR_ERR(obj) == -ENODEV && is_stolen)