batman-adv: Use parentheses in function kernel-doc

The documentation describing kernel-doc comments for functions ("How to
format kernel-doc comments") uses parentheses at the end of the function
name. Using this format allows to use a consistent style when adding
documentation to a function and when referencing this function in a
different kernel-doc section.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
index 71ba58c..8af5d30 100644
--- a/net/batman-adv/icmp_socket.c
+++ b/net/batman-adv/icmp_socket.c
@@ -335,7 +335,7 @@
 }
 
 /**
- * batadv_socket_add_packet - schedule an icmp packet to be sent to
+ * batadv_socket_add_packet() - schedule an icmp packet to be sent to
  *  userspace on an icmp socket.
  * @socket_client: the socket this packet belongs to
  * @icmph: pointer to the header of the icmp packet
@@ -392,7 +392,7 @@
 }
 
 /**
- * batadv_socket_receive_packet - schedule an icmp packet to be received
+ * batadv_socket_receive_packet() - schedule an icmp packet to be received
  *  locally and sent to userspace.
  * @icmph: pointer to the header of the icmp packet
  * @icmp_len: total length of the icmp packet