bcma: clean exports of functions

Function managing IRQs is needed for external drivers like b43.
On the other side we do not expect writing any hosts drivers outside of
bcma, so this is safe to do not export functions related to this.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index 12a75ab..4228736 100644
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -13,8 +13,8 @@
 struct bcma_bus;
 
 /* main.c */
-extern int bcma_bus_register(struct bcma_bus *bus);
-extern void bcma_bus_unregister(struct bcma_bus *bus);
+int bcma_bus_register(struct bcma_bus *bus);
+void bcma_bus_unregister(struct bcma_bus *bus);
 
 /* scan.c */
 int bcma_bus_scan(struct bcma_bus *bus);