[PATCH] fix ptr_ret.cocci warnings

[kbuild test robot]

From: kbuild test robot <lkp@xxxxxxxxx>

drivers/pci/controller/pcie-rockchip-host.c:628:1-3: 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: 069ade5dfec9 ("Merge branch 'remotes/lorenzo/pci/rockchip'")
Signed-off-by: kbuild test robot <lkp@xxxxxxxxx>
---

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b371ddb94fae82b6565020639b7db31934043c65
commit: 069ade5dfec93dd2916a85df8b1bab2d578857bd Merge branch 'remotes/lorenzo/pci/rockchip'

 pcie-rockchip-host.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/pci/controller/pcie-rockchip-host.c
+++ b/drivers/pci/controller/pcie-rockchip-host.c
@@ -625,10 +625,7 @@ static int rockchip_pcie_parse_host_dt(s
 		return PTR_ERR(rockchip->vpcie1v8);
 
 	rockchip->vpcie0v9 = devm_regulator_get(dev, "vpcie0v9");
-	if (IS_ERR(rockchip->vpcie0v9))
-		return PTR_ERR(rockchip->vpcie0v9);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(rockchip->vpcie0v9);
 }
 
 static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)