clang-format: update to latest from docs repo

Since `Cpp11` is an alias for `Latest` and we should tend towards using the
latest C++ standard, update the C++ standard to Latest.

https://github.com/llvm/llvm-project/commit/e5032567903de19962333c4bf7d2edceaf4f9824#diff-b49a097415dff2837d9626d422c58ba8R82
https://github.com/openbmc/docs/blob/master/style/cpp/.clang-format

Also, other OpenBMC repos are doing the same.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I449e88bb4e1e262060110e1a8f3e8db3ddfc74cf
diff --git a/oem/ibm/libpldmresponder/file_io_type_cert.hpp b/oem/ibm/libpldmresponder/file_io_type_cert.hpp
index a981fab..a1c8d9f 100644
--- a/oem/ibm/libpldmresponder/file_io_type_cert.hpp
+++ b/oem/ibm/libpldmresponder/file_io_type_cert.hpp
@@ -27,8 +27,7 @@
      */
     CertHandler(uint32_t fileHandle, uint16_t fileType) :
         FileHandler(fileHandle), certType(fileType)
-    {
-    }
+    {}
 
     virtual int writeFromMemory(uint32_t offset, uint32_t length,
                                 uint64_t address);
@@ -48,8 +47,7 @@
     /** @brief CertHandler destructor
      */
     ~CertHandler()
-    {
-    }
+    {}
 
   private:
     uint16_t certType;      //!< type of the certificate