usb: phy: msm: cast to enum msm_usb_phy_type

this solves the following build warning found when
running compile tests.

drivers/usb/phy/phy-msm-usb.c: In function ‘msm_otg_read_dt’:
drivers/usb/phy/phy-msm-usb.c:1459:20: warning: cast from pointer \
	to integer of different size [-Wpointer-to-int-cast]
  pdata->phy_type = (int) id->data;
                    ^
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-msm-usb.c

@@ -1456,7 +1456,7 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	motg->pdata = pdata;
 
 	id = of_match_device(msm_otg_dt_match, &pdev->dev);
-	pdata->phy_type = (int) id->data;
+	pdata->phy_type = (enum msm_usb_phy_type) id->data;
 
 	motg->link_rst = devm_reset_control_get(&pdev->dev, "link");
 	if (IS_ERR(motg->link_rst))