dm mpath: eliminate pg_ready() wrapper

pg_ready() is not comprehensive in its logic and only serves to
obfuscate code.  Replace pg_ready() with the appropriate logic in
multipath_map().

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index f4167b0..833d7e7 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -373,8 +373,6 @@
 		 dm_noflush_suspending(m->ti)));
 }
 
-#define pg_ready(m) (!(m)->queue_io && !(m)->pg_init_required)
-
 /*
  * Map cloned requests
  */
@@ -402,11 +400,11 @@
 		if (!__must_push_back(m))
 			r = -EIO;	/* Failed */
 		goto out_unlock;
-	}
-	if (!pg_ready(m)) {
+	} else if (m->queue_io || m->pg_init_required) {
 		__pg_init_all_paths(m);
 		goto out_unlock;
 	}
+
 	if (set_mapinfo(m, map_context) < 0)
 		/* ENOMEM, requeue */
 		goto out_unlock;