Add D-BUS interfaces of SMBIOS MDR V2

SMBIOS MDR is an Intel OEM feature which makes BIOS sending SMBIOS table
to BMC through VGA shared memory. These D-Bus interfaces provide a method
for IPMI Commands sync information with the MDRv2 service.
Base on SMBIOS spec DSP0134_3.0.0 and Managed Data Region
Specification Revision 4

Tested:
With the patches in smbios-mdr, BMC can show correct CPU and DIMM
information in Redfish.

Signed-off-by: Cheng C Yang <cheng.c.yang@linux.intel.com>
Change-Id: Ifd9e7e8948fc37fc8eb10866846c8263caedb246
diff --git a/xyz/openbmc_project/Smbios/MDR_V2.errors.yaml b/xyz/openbmc_project/Smbios/MDR_V2.errors.yaml
new file mode 100644
index 0000000..d8b8708
--- /dev/null
+++ b/xyz/openbmc_project/Smbios/MDR_V2.errors.yaml
@@ -0,0 +1,9 @@
+- name: InvalidParameter
+  description: >
+    An invalid parameter is attempted.
+- name: UpdateInProgress
+  description: >
+    Update is in progress.
+- name: InvalidId
+  description: >
+    An invalid Id is attempted.