dsp: base: Add ACKNOWLEDGE_COMPLETION transfer flag

ACKNOWLEDGE_COMPLETION flag is defined in DSP0240 v1.1.0 under
MultipartReceive response data structure definition.

Change-Id: I1bd340ebd2d52175991f2084c1586bf3fe75b6ae
Signed-off-by: Kasun Athukorala <kasunath@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a03e21..f0e2054 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -77,6 +77,7 @@
 - Add flags parameter to `decode_pldm_firmware_update_package()`
 - Add NOLINT to `pldm__package_header_information` to prevent clang-tidy errors.
 - Updated PLDM_PDR_FILE_DESCRIPTOR_PDR_MIN_LENGTH macro comment.
+- Added PLDM_ACKNOWLEDGE_COMPLETION flag to transfer_resp_flag list.
 
 ### Deprecated
 
diff --git a/include/libpldm/base.h b/include/libpldm/base.h
index 573fc8b..65a826e 100644
--- a/include/libpldm/base.h
+++ b/include/libpldm/base.h
@@ -108,6 +108,7 @@
 	PLDM_MIDDLE = 0x02,
 	PLDM_END = 0x04,
 	PLDM_START_AND_END = 0x05,
+	PLDM_ACKNOWLEDGE_COMPLETION = 0x08,
 };
 
 /** @brief PLDM transport protocol type