[IPoIB] Rename ipoib_create_qp() -> ipoib_init_qp() and fix error cleanup

ipoib_create_qp() no longer creates IPoIB's QP, so it shouldn't
destroy the QP on failure -- that unwinding happens elsewhere, so the
current code can cause a double free.  While we're at it, the
function's name should match what it actually does, so rename it to
ipoib_init_qp().

Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index f744009..02d0e00 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -387,9 +387,9 @@
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	int ret;
 
-	ret = ipoib_qp_create(dev);
+	ret = ipoib_init_qp(dev);
 	if (ret) {
-		ipoib_warn(priv, "ipoib_qp_create returned %d\n", ret);
+		ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
 		return -1;
 	}