vintf: Cleanup private members fields of KernelInfo.

Test: mma
Test: libvintf_test

Bug: 34620633
Change-Id: I34ac16815d4b3e812d695f67feb18e50484e0bc5
diff --git a/parse_string.cpp b/parse_string.cpp
index fae395d..b75d576 100644
--- a/parse_string.cpp
+++ b/parse_string.cpp
@@ -370,8 +370,8 @@
         << ki.osVersion() << "/"
         << ki.hardwareId() << ";"
         << "kernelSepolicyVersion = " << ki.kernelSepolicyVersion() << ";"
-        << "#CONFIG's loaded = " << ki.kernelConfigs.size() << ";\n";
-    for (const auto &pair : ki.kernelConfigs) {
+        << "#CONFIG's loaded = " << ki.mKernelConfigs.size() << ";\n";
+    for (const auto &pair : ki.mKernelConfigs) {
         oss << pair.first << "=" << pair.second << "\n";
     }