[kvm]: add eeprom.py for kvm image (#3637)

Author: lguohan

device/virtual/x86_64-kvm_x86_64-r0/plugins/eeprom.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+
+#############################################################################
+# SONiC Virtual switch platform
+#
+#############################################################################
+
+class board():
+
+    def __init__(self, name, path, cpld_root, ro):
+        return
+
+    def check_status(self):
+        return "ok"
+
+    def is_checksum_valid(self, e):
+        return (True, 0)
+
+    def read_eeprom(self):
+        return \
+"""
+TLV Name             Code Len Value
+-------------------- ---- --- -----
+Product Name         0x21   5 SONiC
+Part Number          0x22   6 000000
+Serial Number        0x23  20 0000000000000000000
+Base MAC Address     0x24   6 00:00:00:00:00:01
+Manufacture Date     0x25  19 10/19/2019 00:00:03
+Device Version       0x26   1 1
+Label Revision       0x27   3 A01
+Platform Name        0x28  20 x86_64-kvm_x86_64-r0
+ONIE Version         0x29  19 master-201811170418
+MAC Addresses        0x2A   2 16
+Vendor Name          0x2D   5 SONiC
+"""
+
+    def decode_eeprom(self, e):
+        print e
+
+    def serial_number_str(self, e):
+        """Return service tag instead of serial number"""
+        return "000000"