clang-format: Update to match docs repo

Update the .clang-format file and run clang-format-6.0.
This .clang-format matches the example one in
https://github.com/openbmc/docs/blob/master/cpp-style-and-conventions.md#clang-formatting

Change-Id: Ia331c9a5b040e1a3c45a0ebf1b8d776d93b05ae5
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/argument.cpp b/argument.cpp
index 6d4bb1a..bcd5a13 100644
--- a/argument.cpp
+++ b/argument.cpp
@@ -70,23 +70,23 @@
     std::cerr << "    --help            Print this menu.\n";
     std::cerr << "    --info=<info>     Retrieve info about NCSI topology.\n";
     std::cerr << "    --set=<set>       Set a specific package/channel.\n";
-    std::cerr << "    --clear=<clear>   Clear all the settings on the interface.\n";
+    std::cerr
+        << "    --clear=<clear>   Clear all the settings on the interface.\n";
     std::cerr << "    --package=<package>  Specify a package.\n";
     std::cerr << "    --channel=<channel> Specify a channel.\n";
     std::cerr << "    --index=<device index> Specify device ifindex.\n";
     std::cerr << std::flush;
 }
 
-const option ArgumentParser::options[] =
-{
-    { "info", no_argument, NULL, 'i' },
-    { "set",   no_argument, NULL, 's' },
-    { "clear",   no_argument, NULL, 'r' },
-    { "package",  required_argument, NULL, 'p' },
-    { "channel",   required_argument, NULL, 'c' },
-    { "index",   required_argument, NULL, 'x' },
-    { "help",   no_argument,       NULL, 'h' },
-    { 0, 0, 0, 0},
+const option ArgumentParser::options[] = {
+    {"info", no_argument, NULL, 'i'},
+    {"set", no_argument, NULL, 's'},
+    {"clear", no_argument, NULL, 'r'},
+    {"package", required_argument, NULL, 'p'},
+    {"channel", required_argument, NULL, 'c'},
+    {"index", required_argument, NULL, 'x'},
+    {"help", no_argument, NULL, 'h'},
+    {0, 0, 0, 0},
 };
 
 const char* ArgumentParser::optionStr = "i:s:r:p:c:x:h?";
@@ -94,7 +94,6 @@
 const std::string ArgumentParser::trueString = "true";
 const std::string ArgumentParser::emptyString = "";
 
-} //namespace ncsi
-} //namespace network
-} //namespece phosphor
-
+} // namespace ncsi
+} // namespace network
+} // namespace phosphor