Add FdtGetName() and FdtNodeDepth() function. Cc: Benny Lin <benny.lin@intel.com> Cc: Gua Guo <gua.guo@intel.com> Cc: Chasel Chiu <chasel.chiu@intel.com> Cc: James Lu <james.lu@intel.com> Reviewed-by: Benny Lin <benny.lin@intel.com> Reviewed-by: Gua Guo <gua.guo@intel.com> Signed-off-by: BruceX Wang <brucex.wang@intel.com>