e1000e: make ioport free

This patch makes e1000e driver ioport-free.
This corrects behavior in probe function so as not to request ioport
resources as long as they are not really needed.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index d3bc6f8..4a4f62e 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -283,6 +283,10 @@
 	unsigned long led_status;
 
 	unsigned int flags;
+
+	/* for ioport free */
+	int bars;
+	int need_ioport;
 };
 
 struct e1000_info {