usb: chipidea: imx: add missing USB PHY DPDM wakeup setting

USB PHY DPDM wakeup bit is enabled by default, when USB wakeup
is not required(/sys/.../wakeup is disabled), this bit should be
disabled, otherwise we will have unexpected wakeup if do USB device
connect/disconnect while system sleep.
This bit can be enabled for both host and device mode.

Signed-off-by: Li Jun <[e-mail]>
Signed-off-by: Xu Yang <[e-mail]>
Acked-by: Peter Chen <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/chipidea/usbmisc_imx.c

···
 #define TXVREFTUNE0_MASK		(0xf << 20)
 
 #define MX6_USB_OTG_WAKEUP_BITS (MX6_BM_WAKEUP_ENABLE | MX6_BM_VBUS_WAKEUP | \
-				 MX6_BM_ID_WAKEUP)
+				 MX6_BM_ID_WAKEUP | MX6SX_BM_DPDM_WAKEUP_EN)
 
 struct usbmisc_ops {
 	/* It's called once when probe a usb device */