staging: typec: pd: Document struct pd_message

struct pd_message is the format of a PD message as seen on the wire.

Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/typec/pd.h

···
 
 #define PD_MAX_PAYLOAD		7
 
+/**
+ * struct pd_message - PD message as seen on wire
+ * @header:	PD message header
+ * @payload:	PD message payload
+ */
 struct pd_message {
 	__le16 header;
 	__le32 payload[PD_MAX_PAYLOAD];