net: dsa: realtek-smi: fix kdoc warnings

Removed kdoc mark for incomplete struct description.
Added a return description for rtl8366rb_drop_untagged.
Signed-off-by: NLuiz Angelo Daros de Luca <luizluca@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/dsa/realtek-smi-core.h

@@ -25,7 +25,7 @@ struct rtl8366_mib_counter {
 	const char	*name;
 };
 
-/**
+/*
  * struct rtl8366_vlan_mc - Virtual LAN member configuration
  */
 struct rtl8366_vlan_mc {
@@ -74,7 +74,7 @@ struct realtek_smi {
 	void			*chip_data; /* Per-chip extra variant data */
 };
 
-/**
+/*
  * struct realtek_smi_ops - vtable for the per-SMI-chiptype operations
  * @detect: detects the chiptype
  */

drivers/net/dsa/rtl8366rb.c

@@ -1252,6 +1252,8 @@ rtl8366rb_port_bridge_leave(struct dsa_switch *ds, int port,
  * @smi: SMI state container
  * @port: the port to drop untagged and C-tagged frames on
  * @drop: whether to drop or pass untagged and C-tagged frames
+ *
+ * Return: zero for success, a negative number on error.
  */
 static int rtl8366rb_drop_untagged(struct realtek_smi *smi, int port, bool drop)
 {