usb: ehci-mx6: Remove MX6Q_ARM2 related ifdefery

The imx6q arm2 board support has been removed from U-Boot
as it did not get converted to DM.

Remove the MX6Q_ARM2 related ifdefery in the driver.

Signed-off-by: Fabio Estevam <festevam@denx.de>
diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 060b02a..e30449b 100644
--- a/drivers/usb/host/ehci-mx6.c
+++ b/drivers/usb/host/ehci-mx6.c
@@ -272,12 +272,7 @@
 {
 	void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl[index]);
 
-#if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2
-	/* mx6qarm2 seems to required a different setting*/
-	clrbits_le32(ctrl, UCTRL_OVER_CUR_POL);
-#else
 	setbits_le32(ctrl, UCTRL_OVER_CUR_POL);
-#endif
 
 	setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);