libcxgb: export ppm release and tagmask set api

Export cxgbi_ppm_release() to release
ppod manager and cxgbi_tagmask_set() to
set tag mask, they are used by cxgb3i, cxgb4i
and cxgbit.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/target/iscsi/cxgbit/cxgbit_main.c

@@ -26,6 +26,8 @@ void _cxgbit_free_cdev(struct kref *kref)
 	struct cxgbit_device *cdev;
 
 	cdev = container_of(kref, struct cxgbit_device, kref);
+
+	cxgbi_ppm_release(cdev2ppm(cdev));
 	kfree(cdev);
 }