greybus: remove unused function descriptor fields and change class->function_type

Greybus spec was updated to remove a number of unused function descriptor
fields. In addition, the class field was change to function_type to avoid
confusion with the concept of high-level class drivers.
Signed-off-by: Matt Porter <mporter@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/staging/greybus/greybus_manifest.h

@@ -31,7 +31,7 @@ struct greybus_descriptor_header {
 	__le16	type;	/* enum greybus_descriptor_type */
 };
 
-enum greybus_function_class {
+enum greybus_function_type {
 	GREYBUS_FUNCTION_CONTROL	= 0x00,
 	GREYBUS_FUNCTION_USB		= 0x01,
 	GREYBUS_FUNCTION_GPIO		= 0x02,
@@ -49,12 +49,8 @@ enum greybus_function_class {
 };
 
 struct greybus_descriptor_function {
-	__le16	number;
 	__le16	cport;
-	__u8	class;		/* enum greybus_function_class */
-	__u8	subclass;
-	__u8	protocol;
-	__u8	reserved;
+	__u8	function_type;	/* enum greybus_function_type */
 };
 
 struct greybus_descriptor_module {

drivers/staging/greybus/sysfs.c

@@ -31,18 +31,12 @@ static ssize_t function_##field##_show(struct device *dev,		\
 }									\
 static DEVICE_ATTR_RO(function_##field)
 
-greybus_function_attr(number);
 greybus_function_attr(cport);
-greybus_function_attr(class);
-greybus_function_attr(subclass);
-greybus_function_attr(protocol);
+greybus_function_attr(function_type);
 
 static struct attribute *function_attrs[] = {
-	&dev_attr_function_number.attr,
 	&dev_attr_function_cport.attr,
-	&dev_attr_function_class.attr,
-	&dev_attr_function_subclass.attr,
-	&dev_attr_function_protocol.attr,
+	&dev_attr_function_function_type.attr,
 	NULL,
 };
 
@@ -53,11 +47,8 @@ static umode_t function_attrs_are_visible(struct kobject *kobj,
 
 	// FIXME - make this a dynamic structure to "know" if it really is here
 	// or not easier?
-	if (gmod->function.number ||
-	    gmod->function.cport ||
-	    gmod->function.class ||
-	    gmod->function.subclass ||
-	    gmod->function.protocol)
+	if (gmod->function.cport ||
+	    gmod->function.function_type)
 		return a->mode;
 	return 0;
 }