ata: ahci_imx: Fix error code in probe()

Return a negative error code if devm_clk_get() fails.  Don't return
success.

Fixes: 3156e1b2 ("ata: ahci_imx: AHB clock rate setting is not required on i.MX8QM AHCI SATA")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/cbcbdfc2-ddc7-4684-8ad4-018227823546@stanley.mountainSigned-off-by: Niklas Cassel <cassel@kernel.org>

drivers/ata/ahci_imx.c

@@ -963,6 +963,7 @@ static int imx_ahci_probe(struct platform_device *pdev)
 		imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
 		if (IS_ERR(imxpriv->ahb_clk)) {
 			dev_err(dev, "Failed to get ahb clock\n");
+			ret = PTR_ERR(imxpriv->ahb_clk);
 			goto disable_sata;
 		}
 		reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;