Rename function `formatFRU` to `formatIPMIFRU`

`FruDevice` can parse FRU content more than IPMI format.
Rename the function to a more specific name.

Signed-off-by: Michael Shen <gpgpgp@google.com>
Change-Id: If24f9cb0d51bb18c924b800fee595f52f85673dc
diff --git a/include/FruUtils.hpp b/include/FruUtils.hpp
index 906b77e..05a8bee 100644
--- a/include/FruUtils.hpp
+++ b/include/FruUtils.hpp
@@ -109,7 +109,7 @@
 bool checkLangEng(uint8_t lang);
 
 resCodes
-    formatFRU(const std::vector<uint8_t>& fruBytes,
+    formatIPMIFRU(const std::vector<uint8_t>& fruBytes,
               boost::container::flat_map<std::string, std::string>& result);
 
 std::vector<uint8_t>& getFRUInfo(const uint8_t& bus, const uint8_t& address);