SUNRPC: Add RPC_AUTH_TLS protocol numbers

Shared by client and server. See:

https://www.iana.org/assignments/rpc-authentication-numbers/rpc-authentication-numbers.xhtmlSigned-off-by: Chuck Lever <chuck.lever@oracle.com>

include/linux/sunrpc/msg_prot.h

@@ -20,6 +20,7 @@ enum rpc_auth_flavors {
 	RPC_AUTH_DES   = 3,
 	RPC_AUTH_KRB   = 4,
 	RPC_AUTH_GSS   = 6,
+	RPC_AUTH_TLS   = 7,
 	RPC_AUTH_MAXFLAVOR = 8,
 	/* pseudoflavors: */
 	RPC_AUTH_GSS_KRB5  = 390003,

include/linux/sunrpc/xdr.h

@@ -95,6 +95,7 @@ xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
 #define	rpc_auth_unix	cpu_to_be32(RPC_AUTH_UNIX)
 #define	rpc_auth_short	cpu_to_be32(RPC_AUTH_SHORT)
 #define	rpc_auth_gss	cpu_to_be32(RPC_AUTH_GSS)
+#define	rpc_auth_tls	cpu_to_be32(RPC_AUTH_TLS)
 
 #define	rpc_call	cpu_to_be32(RPC_CALL)
 #define	rpc_reply	cpu_to_be32(RPC_REPLY)