spdm: large-transfer: set chunk capability

In the flags field of a GET_CAPABILITIES request, ensure we indicate
that large transfers are supported by setting the CHUNK_CAP bit [1].

[1] SPDM Spec 1.3: Table 13

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>

Author: twilfredo

lib/spdm/req-authenticate.c

@@ -118,6 +118,7 @@ static int spdm_get_capabilities(struct spdm_state *spdm_state)
 		rsp_sz = sizeof(*rsp);
 		req->data_transfer_size = cpu_to_le32(spdm_state->transport_sz);
 		req->max_spdm_msg_size = cpu_to_le32(UINT_MAX);
+		req->flags = cpu_to_le32(req->flags | SPDM_CHUNK_CAP);
 	}
 
 	rsp = spdm_state->transcript_end += req_sz;