Some error handling bugs noted by Ronen Vainish

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5122 42af7a65-404d-4744-a932-0658087f49c3

drivers/mmcsd/mmcsd_sdio.c

@@ -3171,7 +3171,9 @@ errout_with_buffers:
 #if defined(CONFIG_FS_WRITEBUFFER) || defined(CONFIG_FS_READAHEAD)
   rwb_uninitialize(&priv->rwbuffer);
 errout_with_hwinit:
-#endif
+#endif
+  mmcsd_hwuninitialize(priv);  /* This will free the private data structure */
+  return ret;
 
 errout_with_alloc:
   kfree(priv);