phy: qcom: fix error code in snps_eusb2_hsphy_probe()

When phy->ref_clk is NULL PTR_ERR(NULL) will be a success. Fix this by
using -ENOENT when phy->ref_clk is NULL instead.

Fixes: 8009081 ("phy: qcom: Add QCOM SNPS eUSB2 driver")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/aDCbeuCTy9zyWJAM@stanley.mountain/
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://lore.kernel.org/r/20250710172403.2593193-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: harshimogalapalli

drivers/phy/phy-snps-eusb2.c

@@ -567,9 +567,11 @@ static int snps_eusb2_hsphy_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (IS_ERR_OR_NULL(phy->ref_clk))
-		return dev_err_probe(dev, PTR_ERR(phy->ref_clk),
+	if (IS_ERR_OR_NULL(phy->ref_clk)) {
+		ret = phy->ref_clk ? PTR_ERR(phy->ref_clk) : -ENOENT;
+		return dev_err_probe(dev, ret,
 				     "failed to get ref clk\n");
+	}
 
 	num = ARRAY_SIZE(phy->vregs);
 	for (i = 0; i < num; i++)