nvme-tcp: add definitions for TLS cipher suites

Signed-off-by: Hannes Reinecke <[e-mail]>
Reviewed-by: Sagi Grimberg <[e-mail]>
Signed-off-by: Keith Busch <[e-mail]>

include/linux/nvme-tcp.h

···
 	NVME_TCP_PFV_1_0 = 0x0,
 };
 
+enum nvme_tcp_tls_cipher {
+	NVME_TCP_TLS_CIPHER_INVALID     = 0,
+	NVME_TCP_TLS_CIPHER_SHA256      = 1,
+	NVME_TCP_TLS_CIPHER_SHA384      = 2,
+};
+
 enum nvme_tcp_fatal_error_status {
 	NVME_TCP_FES_INVALID_PDU_HDR		= 0x01,
 	NVME_TCP_FES_PDU_SEQ_ERR		= 0x02,