pci: layerscape: Add stream_id_cur field to ls_pcie structure

Add stream_id_cur field to ls_pcie structure and initialize
it with 0 for all pcie controllers. This field will be used
for streamId calculation.
Signed-off-by: NWasim Khan <wasim.khan@nxp.com>
Reviewed-by: NPriyanka Jain <priyanka.jain@nxp.com>

drivers/pci/pcie_layerscape.c

 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2017 NXP
+ * Copyright 2017-2019 NXP
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  * Layerscape PCIe driver
  */
@@ -339,6 +339,7 @@ static void ls_pcie_setup_ctrl(struct ls_pcie *pcie)
 	dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN);
 
 	ls_pcie_disable_bars(pcie);
+	pcie->stream_id_cur = 0;
 }
 
 static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie)

drivers/pci/pcie_layerscape.h

 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Copyright 2017 NXP
+ * Copyright 2017-2019 NXP
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  * Layerscape PCIe driver
  */
@@ -144,6 +144,7 @@ struct ls_pcie {
 	bool big_endian;
 	bool enabled;
 	int next_lut_index;
+	int stream_id_cur;
 	int mode;
 };