bcma: ignore extra GMAC cores on BCM4706

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 9a6188a..f72f52b 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -120,6 +120,11 @@
 			continue;
 		}
 
+		/* Only first GMAC core on BCM4706 is connected and working */
+		if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
+		    core->core_unit > 0)
+			continue;
+
 		core->dev.release = bcma_release_core_dev;
 		core->dev.bus = &bcma_bus_type;
 		dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);