ethernet_interface: Fix variable naming

The new function names introduced by
6aef769f1d2e8015b98cb3d8d6c20a81d60f1be0 caused a naming conflict with
local variables. Update the local variable names to fix the conflict.

Change-Id: Ib916b347bcb683dd352943dccf57d806669f33f7
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/ethernet_interface.cpp b/ethernet_interface.cpp
index 4f0ceab..607e658 100644
--- a/ethernet_interface.cpp
+++ b/ethernet_interface.cpp
@@ -363,12 +363,12 @@
     Autoneg autoneg{0};
     DuplexMode duplex{0};
     LinkUp linkState{false};
-    NICEnabled nicEnabled{false};
+    NICEnabled enabled{false};
     EthernetIntfSocket eifSocket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 
     if (eifSocket.sock < 0)
     {
-        return std::make_tuple(speed, duplex, autoneg, linkState, nicEnabled);
+        return std::make_tuple(speed, duplex, autoneg, linkState, enabled);
     }
 
     std::strncpy(ifr.ifr_name, interfaceName().c_str(), IFNAMSIZ - 1);
@@ -382,10 +382,10 @@
         autoneg = edata.autoneg;
     }
 
-    nicEnabled = nicEnabled();
+    enabled = nicEnabled();
     linkState = linkUp();
 
-    return std::make_tuple(speed, duplex, autoneg, linkState, nicEnabled);
+    return std::make_tuple(speed, duplex, autoneg, linkState, enabled);
 }
 #endif