[VOL-4676]:
Initial Framework for reading SFP capabilities by reading the EEPROM data.
Use the detected SFP data to derive the MAC and PON system mode.
Make the SFP EEPROM read mode configurable per platform through the
DYNAMIC_PON_TRX_SUPPORT '#define' defined in the platform vendor.h file.

Change-Id: I07d7763371d2f804a1e93ca38646b1a30198f8ee
diff --git a/agent/device/asfvolt16/vendor.cc b/agent/device/asfvolt16/vendor.cc
index 86836ff..1c88cb0 100644
--- a/agent/device/asfvolt16/vendor.cc
+++ b/agent/device/asfvolt16/vendor.cc
@@ -19,3 +19,13 @@
 void vendor_init()
 {
 }
+
+// Returns the MAC System Mode based on the set of SFP IDs provided.
+// The derived class will most likely need to override this method to provide a
+// different implementation for that particular OLT platform.
+pair<bcmolt_system_mode, bool> PonTrx::get_mac_system_mode(int olt_mac_id, set<int> sfp_ids) {
+    bool ret = true;
+    bcmolt_system_mode sm = BCMOLT_SYSTEM_MODE_XGS__2_X;
+
+    return {sm, ret};
+}
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