logging: switch ncsi-netlink to lg2

Tested: Build passes with "ninja -C build".
Change-Id: Iac053348b1125d15bcf65e27487c6814fa85650a
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
diff --git a/src/ncsi_netlink_main.cpp b/src/ncsi_netlink_main.cpp
index 12d59be..c437695 100644
--- a/src/ncsi_netlink_main.cpp
+++ b/src/ncsi_netlink_main.cpp
@@ -16,14 +16,14 @@
 #include "argument.hpp"
 #include "ncsi_util.hpp"
 
-#include <iostream>
+#include <phosphor-logging/lg2.hpp>
 #include <string>
 #include <vector>
 
 static void exitWithError(const char* err, char** argv)
 {
     phosphor::network::ncsi::ArgumentParser::usage(argv);
-    std::cerr << "ERROR: " << err << "\n";
+    lg2::error("ERROR: {ERROR}", "ERROR", err);
     exit(EXIT_FAILURE);
 }