phy: HiSilicon: Fix copy and paste bug in error handling

This should check ">pmctrl" instead of "->sysctrl".  This bug could
potentially lead to a crash if we dereference the error pointer.

Fixes: 73075011 ("phy: HiSilicon: Add driver for Kirin 970 PCIe PHY")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20211117074843.GE5237@kiliSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/hisilicon/phy-hi3670-pcie.c

@@ -757,8 +757,8 @@ static int hi3670_pcie_phy_get_resources(struct hi3670_pcie_phy *phy,
 		return PTR_ERR(phy->sysctrl);
 
 	phy->pmctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-pmctrl");
-	if (IS_ERR(phy->sysctrl))
-		return PTR_ERR(phy->sysctrl);
+	if (IS_ERR(phy->pmctrl))
+		return PTR_ERR(phy->pmctrl);
 
 	/* clocks */
 	phy->phy_ref_clk = devm_clk_get(dev, "phy_ref");