net: dsa: vsc73xx: add structure descriptions

This commit adds updates to the documentation describing the structures
used in vsc73xx. This will help prevent kdoc-related issues in the future.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Link: https://lore.kernel.org/r/20240417205048.3542839-6-paweldembicki@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/vitesse-vsc73xx.h

@@ -15,7 +15,16 @@
 #define VSC73XX_MAX_NUM_PORTS	8
 
 /**
- * struct vsc73xx - VSC73xx state container
+ * struct vsc73xx - VSC73xx state container: main data structure
+ * @dev: The device pointer
+ * @reset: The descriptor for the GPIO line tied to the reset pin
+ * @ds: Pointer to the DSA core structure
+ * @gc: Main structure of the GPIO controller
+ * @chipid: Storage for the Chip ID value read from the CHIPID register of the
+ *	switch
+ * @addr: MAC address used in flow control frames
+ * @ops: Structure with hardware-dependent operations
+ * @priv: Pointer to the configuration interface structure
  */
 struct vsc73xx {
 	struct device			*dev;
@@ -28,6 +37,11 @@ struct vsc73xx {
 	void				*priv;
 };
 
+/**
+ * struct vsc73xx_ops - VSC73xx methods container
+ * @read: Method for register reading over the hardware-dependent interface
+ * @write: Method for register writing over the hardware-dependent interface
+ */
 struct vsc73xx_ops {
 	int (*read)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
 		    u32 *val);