[PATCH 13/23] of_graph: add of_graph_port_type_is()

From: Kuninori Morimoto OF graph indicates each devices connection. But it doesn't support type of each port. For example HDMI case, it has video port and sound port in one device node. In this case, current driver can't handle each port correctly. This patch

[PATCH 13/23] of_graph: add of_graph_port_type_is()

From: Kuninori Morimoto OF graph indicates each devices connection. But it doesn't support type of each port. For example HDMI case, it has video port and sound port in one device node. In this case, current driver can't handle each port correctly. This patch adds of_graph_port_type_is() for