drm/shmem-helper: Revert accidental non-GPL export

The referenced commit added a wrapper for drm_gem_shmem_get_pages_sgt(),
but in the process it accidentally changed the export type from GPL to
non-GPL. Switch it back to GPL.

Reported-by: Dmitry Osipenko <[email protected]>
Fixes: ddddeda ("drm/shmem-helper: Fix locking for drm_gem_shmem_get_pages_sgt()")
Signed-off-by: Asahi Lina <[email protected]>
Signed-off-by: Thomas Zimmermann <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: asahilina

drivers/gpu/drm/drm_gem_shmem_helper.c

@@ -744,7 +744,7 @@ struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem)
 
 	return sgt;
 }
-EXPORT_SYMBOL(drm_gem_shmem_get_pages_sgt);
+EXPORT_SYMBOL_GPL(drm_gem_shmem_get_pages_sgt);
 
 /**
  * drm_gem_shmem_prime_import_sg_table - Produce a shmem GEM object from