libpldm: Add decode API for CancelUpdateComponent response

Update agent send this command to FD/FDP during firmware component
transfer process.The FD/FDP, upon receiving this command shall stop
sending RequestFirmwareData commands to the UA, and cancel the
current component update procedure. The FD/FDP controller shall
transition to the READY XFER state of update mode and be ready to
accept another UpdateComponent command. This implementation works
with DSP0267_1.1.0, DSP0267_1.0.1 and DSP0267_1.0.0.

Tested: Unit tests passed

Signed-off-by: gokulsanker <gokul.sanker.v.g@intel.com>
Change-Id: I1625489bd78729367439e3c495c91c9699341007
diff --git a/libpldm/firmware_update.c b/libpldm/firmware_update.c
index 0df6aaf..6714136 100644
--- a/libpldm/firmware_update.c
+++ b/libpldm/firmware_update.c
@@ -1467,3 +1467,19 @@
 

 	return PLDM_SUCCESS;

 }

+

+int decode_cancel_update_component_resp(const struct pldm_msg *msg,

+					size_t payload_length,

+					uint8_t *completion_code)

+{

+	if (msg == NULL || completion_code == NULL) {

+		return PLDM_ERROR_INVALID_DATA;

+	}

+

+	if (payload_length != sizeof(*completion_code)) {

+		return PLDM_ERROR_INVALID_LENGTH;

+	}

+

+	*completion_code = msg->payload[0];

+	return PLDM_SUCCESS;

+}