phy: eswin: Fix incorrect error check in probe()

devm_ioremap() returns NULL on failure, not an ERR_PTR.
Using IS_ERR() to check the return value is incorrect.

Fix this by checking for NULL and returning -ENOMEM.

Fixes: 67ee9cc ("phy: eswin: Create eswin directory and add EIC7700 SATA PHY driver")
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/linux-phy/adjNbuWoc1B-3Ok1@stanley.mountain/
Signed-off-by: Yulin Lu <luyulin@eswincomputing.com>
Link: https://patch.msgid.link/20260413070033.128-1-luyulin@eswincomputing.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: luyunlineswincomputing

drivers/phy/eswin/phy-eic7700-sata.c

@@ -216,8 +216,8 @@ static int eic7700_sata_phy_probe(struct platform_device *pdev)
 		return -ENOENT;
 
 	regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(regs))
-		return PTR_ERR(regs);
+	if (!regs)
+		return -ENOMEM;
 
 	sata_phy->regmap = devm_regmap_init_mmio
 			   (dev, regs, &eic7700_sata_phy_regmap_config);