net: add Runtime PM to the sh_eth driver

Add Runtime PM support to the sh_eth driver.

The clock to the ethernet hardware block will be
enabled as long as the network device is up.

Signed-off-by: Magnus Damm <damm@opensource.se>
Tested-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sh_eth.h b/drivers/net/sh_eth.h
index ba151f8..8b47763 100644
--- a/drivers/net/sh_eth.h
+++ b/drivers/net/sh_eth.h
@@ -703,6 +703,7 @@
 };
 
 struct sh_eth_private {
+	struct platform_device *pdev;
 	struct sh_eth_cpu_data *cd;
 	dma_addr_t rx_desc_dma;
 	dma_addr_t tx_desc_dma;