accel/amdxdna: Fix incorrect type used for a local variable

drivers/accel/amdxdna/aie2_pci.c:794:13: sparse: sparse: incorrect type in assignment (different address spaces)

Fixes: c8cea43 ("accel/amdxdna: Add a function to walk hardware contexts")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202508230855.0b9efFl6-lkp@intel.com/
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://lore.kernel.org/r/20250826171951.801585-1-lizhi.hou@amd.com

Author: houlz0507

drivers/accel/amdxdna/aie2_pci.c

@@ -785,8 +785,9 @@ static int aie2_get_clock_metadata(struct amdxdna_client *client,
 
 static int aie2_hwctx_status_cb(struct amdxdna_hwctx *hwctx, void *arg)
 {
-	struct amdxdna_drm_query_hwctx __user *buf, *tmp __free(kfree) = NULL;
+	struct amdxdna_drm_query_hwctx *tmp __free(kfree) = NULL;
 	struct amdxdna_drm_get_info *get_info_args = arg;
+	struct amdxdna_drm_query_hwctx __user *buf;
 
 	if (get_info_args->buffer_size < sizeof(*tmp))
 		return -EINVAL;