net: Fix (nearly-)kernel-doc comments for various functions

Fix incorrect start markers, wrapped summary lines, missing section
breaks, incorrect separators, and some name mismatches.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 32761b5..62ebe3c 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -504,7 +504,7 @@
  * @pid: netlink pid the message is addressed to
  * @seq: sequence number (usually the one of the sender)
  * @family: generic netlink family
- * @flags netlink message flags
+ * @flags: netlink message flags
  * @cmd: generic netlink command
  *
  * Returns pointer to user specific header