greybus: svc: unexport eject helper

Do no export the interface-eject helper, which is only supposed to be
used by core.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Jeffrey Carlyle <jcarlyle@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/svc.c

@@ -143,7 +143,6 @@ int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id)
 					 sizeof(request), NULL, 0,
 					 GB_SVC_EJECT_TIME);
 }
-EXPORT_SYMBOL_GPL(gb_svc_intf_eject);
 
 int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
 			u32 *value)