Add CMIS QSFP support (sonic-net#246)

Author: andywongarista

sonic_platform_base/sonic_xcvr/codes/public/sff8024.py

@@ -72,7 +72,7 @@ class Sff8024(XcvrCodes):
         27: 'DSFP',
         28: 'Link-x4',
         29: 'Link-x8',
-        30: 'QSFP+'
+        30: 'QSFP+C'
     }
 
     CONNECTORS = {

sonic_platform_base/sonic_xcvr/xcvr_api_factory.py

@@ -40,7 +40,7 @@ def create_xcvr_api(self):
         # TODO: load correct classes from id_mapping file
         id = self._get_id()
         # QSFP-DD or OSFP
-        if id == 0x18 or id == 0x19:
+        if id == 0x18 or id == 0x19 or id == 0x1e:
             codes = CmisCodes
             mem_map = CmisMemMap(codes)
             xcvr_eeprom = XcvrEeprom(self.reader, self.writer, mem_map)