usb: gadget: Remove reference to is_dualspeed from sysfs.

This commit removes the /sys/devices/platform/<UDC>/udc/<UDC>/is_dualspeed
file and is_dualspeeed line from /sys/devices/platform/ci13xxx_*/udc/device
file.

The is_dualspeed file is superseded by maximum_speed in the same directory
and is_dualspeed line in device file is superseded by max_speed line in
the same file.

The maximum_speed/max_speed specifies maximum speed supported by UDC.
To check if dualspeeed is supported, check if the value is >= 3.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/chipidea/debug.c

@@ -160,9 +160,6 @@ static ssize_t show_device(struct device *dev, struct device_attribute *attr,
 		       gadget->speed);
 	n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed         = %d\n",
 		       gadget->max_speed);
-	/* TODO: Scheduled for removal in 3.8. */
-	n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed      = %d\n",
-		       gadget_is_dualspeed(gadget));
 	n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg            = %d\n",
 		       gadget->is_otg);
 	n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral   = %d\n",

drivers/usb/gadget/udc-core.c

@@ -439,16 +439,6 @@ static DEVICE_ATTR(name, S_IRUSR, usb_udc_##param##_show, NULL)
 static USB_UDC_SPEED_ATTR(current_speed, speed);
 static USB_UDC_SPEED_ATTR(maximum_speed, max_speed);
 
-/* TODO: Scheduled for removal in 3.8. */
-static ssize_t usb_udc_is_dualspeed_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct usb_udc		*udc = container_of(dev, struct usb_udc, dev);
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-			gadget_is_dualspeed(udc->gadget));
-}
-static DEVICE_ATTR(is_dualspeed, S_IRUSR, usb_udc_is_dualspeed_show, NULL);
-
 #define USB_UDC_ATTR(name)					\
 ssize_t usb_udc_##name##_show(struct device *dev,		\
 		struct device_attribute *attr, char *buf)	\
@@ -472,7 +462,6 @@ static struct attribute *usb_udc_attrs[] = {
 	&dev_attr_current_speed.attr,
 	&dev_attr_maximum_speed.attr,
 
-	&dev_attr_is_dualspeed.attr,
 	&dev_attr_is_otg.attr,
 	&dev_attr_is_a_peripheral.attr,
 	&dev_attr_b_hnp_enable.attr,