[PATCH] PCI: meson: fix ptr_ret.cocci warnings

[kbuild test robot]

From: kbuild test robot <fengguang...@intel.com>

drivers/pci/controller/dwc/pci-meson.c:121:1-3: WARNING: PTR_ERR_OR_ZERO can be 
used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

Fixes: b43bb00f7533 ("PCI: meson: add the Amlogic Meson PCIe controller driver")
CC: Yue Wang <yue.w...@amlogic.com>
Signed-off-by: kbuild test robot <fengguang...@intel.com>
---

 pci-meson.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -118,10 +118,7 @@ static int meson_pcie_get_mem(struct pla
                return -ENODEV;
 
        mp->mem_res.cfg_base = devm_ioremap_resource(dev, res);
-       if (IS_ERR(mp->mem_res.cfg_base))
-               return PTR_ERR(mp->mem_res.cfg_base);
-
-       return 0;
+       return PTR_ERR_OR_ZERO(mp->mem_res.cfg_base);
 }
 
 static int meson_pcie_init_clk(struct meson_pcie *mp)