net: llc: Fix kerneldoc warnings

net/llc/llc_conn.c:917: warning: Function parameter or member 'kern' not described in 'llc_sk_alloc'
net/llc/llc_conn.c:917: warning: Function parameter or member 'prot' not described in 'llc_sk_alloc'
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201028004644.929997-1-andrew@lunn.chSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/llc/llc_conn.c

@@ -909,6 +909,8 @@ static void llc_sk_init(struct sock *sk)
  *	@net: network namespace
  *	@family: upper layer protocol family
  *	@priority: for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc)
+ *	@prot: struct proto associated with this new sock instance
+ *	@kern: is this to be a kernel socket?
  *
  *	Allocates a LLC sock and initializes it. Returns the new LLC sock
  *	or %NULL if there's no memory available for one