Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/gpu/drm/radeon/radeon_object.h b/drivers/gpu/drm/radeon/radeon_object.h
index 7f8e778..ede6c13 100644
--- a/drivers/gpu/drm/radeon/radeon_object.h
+++ b/drivers/gpu/drm/radeon/radeon_object.h
@@ -87,7 +87,7 @@
  * Returns current GPU offset of the object.
  *
  * Note: object should either be pinned or reserved when calling this
- * function, it might be usefull to add check for this for debugging.
+ * function, it might be useful to add check for this for debugging.
  */
 static inline u64 radeon_bo_gpu_offset(struct radeon_bo *bo)
 {