greybus: rename interface_block.[c|h] -> interface.[c|h]

Interface_block is being renamed to interface, so move the file first.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/drivers/staging/greybus/greybus.h b/drivers/staging/greybus/greybus.h
index 230cc28..e0c5eb7 100644
--- a/drivers/staging/greybus/greybus.h
+++ b/drivers/staging/greybus/greybus.h
@@ -24,7 +24,7 @@
 #include "greybus_id.h"
 #include "greybus_manifest.h"
 #include "manifest.h"
-#include "interface_block.h"
+#include "interface.h"
 #include "bundle.h"
 #include "connection.h"
 #include "protocol.h"