usb: chipidea: imx: enable CI_HDRC_SET_NON_ZERO_TTHA

For i.mx platform, set ttctrl.ttha with non-zero value only affects
sitd, and ehci core makes sure the schedule is not full when accepts
new request, so it will not occur the transaction which will acorss
the SoF.
Signed-off-by: Peter Chen <peter.chen@freescale.com>

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -126,7 +126,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 	struct ci_hdrc_platform_data pdata = {
 		.name		= dev_name(&pdev->dev),
 		.capoffset	= DEF_CAPOFFSET,
-		.flags		= CI_HDRC_DISABLE_STREAMING,
+		.flags		= CI_HDRC_DISABLE_STREAMING |
+					CI_HDRC_SET_NON_ZERO_TTHA,
 	};
 	int ret;
 	const struct of_device_id *of_id =