Revert "net: sctp: convert sctp_checksum_disable module param into sctp sysctl"

This reverts commit cda5f98e36576596b9230483ec52bff3cc97eb21.

As per Vlad's request.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 5448297..5e17092 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1187,9 +1187,6 @@
 	/* Whether Cookie Preservative is enabled(1) or not(0) */
 	net->sctp.cookie_preserve_enable 	= 1;
 
-	/* Whether SCTP checksumming is disabled(1) or not(0) */
-	net->sctp.checksum_disable		= 0;
-
 	/* Default sctp sockets to use md5 as their hmac alg */
 #if defined (CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5)
 	net->sctp.sctp_hmac_alg			= "md5";
@@ -1546,4 +1543,6 @@
 MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132");
 MODULE_AUTHOR("Linux Kernel SCTP developers <linux-sctp@vger.kernel.org>");
 MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
+module_param_named(no_checksums, sctp_checksum_disable, bool, 0644);
+MODULE_PARM_DESC(no_checksums, "Disable checksums computing and verification");
 MODULE_LICENSE("GPL");