Fix appletalk sysctl entry name

Gabriel C reported that modprobing appletalk on current git gives a
warning in dmesg :

   "sysctl table check failed: /net/appletalk .3.7 procname does not match binary path procname"

Oops.  My apologies it appears I made a mistake when creating my table
to check up on sysctl values.
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>
Tested-by: NGabriel C <nix.or.die@googlemail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

kernel/sysctl_check.c

@@ -731,7 +731,7 @@ static struct trans_ctl_table trans_net_table[] = {
 	{ NET_UNIX,		"unix",		trans_net_unix_table },
 	{ NET_IPV4,		"ipv4",		trans_net_ipv4_table },
 	{ NET_IPX,		"ipx",		trans_net_ipx_table },
-	{ NET_ATALK,		"atalk",	trans_net_atalk_table },
+	{ NET_ATALK,		"appletalk",	trans_net_atalk_table },
 	{ NET_NETROM,		"netrom",	trans_net_netrom_table },
 	{ NET_AX25,		"ax25",		trans_net_ax25_table },
 	{ NET_BRIDGE,		"bridge",	trans_net_bridge_table },