phy: qcom: m31-eusb2: Fix the error log while enabling clock

While enabling clock, we incorrectly log 'ref clk' as 'cfg ahb clk'
Fix this since the devicetree bindings mentions it as ref clock.

Signed-off-by: Prashanth K <prashanth.k@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250826105254.3758803-1-prashanth.k@oss.qualcomm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: Prashanth K

drivers/phy/qualcomm/phy-qcom-m31-eusb2.c

@@ -196,7 +196,7 @@ static int m31eusb2_phy_init(struct phy *uphy)
 
 	ret = clk_prepare_enable(phy->clk);
 	if (ret) {
-		dev_err(&uphy->dev, "failed to enable cfg ahb clock, %d\n", ret);
+		dev_err(&uphy->dev, "failed to enable ref clock, %d\n", ret);
 		goto disable_repeater;
 	}