greybus: remove unnecessary greybus.h includes

Remove unnecessary greybus.h include from header files.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/connection.h

@@ -12,8 +12,6 @@
 
 #include <linux/list.h>
 
-#include "greybus.h"
-
 enum gb_connection_state {
 	GB_CONNECTION_STATE_INVALID	= 0,
 	GB_CONNECTION_STATE_DISABLED	= 1,

drivers/staging/greybus/protocol.h

@@ -10,8 +10,7 @@
 #ifndef __PROTOCOL_H
 #define __PROTOCOL_H
 
-#include "greybus.h"
-
+struct gb_connection;
 struct gb_operation;
 
 /* version request has no payload */