style: apply naming convention to ipmi_validate_fru_area

Apply openbmc style naming convention to ipmi_validate_fru_area as part
of a multi-step cleanup process.

Change-Id: I082189030441e57579d072501279ff698fe1b7e3
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/writefrudata.hpp b/writefrudata.hpp
index 1f3e49f..e713bd5 100644
--- a/writefrudata.hpp
+++ b/writefrudata.hpp
@@ -49,7 +49,7 @@
  * @param[in] bus_type - a systemd bus for publishing the information.
  * @param[in] bmc_fru - If a particular area accessible only by BMC.
  */
-int ipmi_validate_fru_area(const uint8_t fruid, const char* fru_file_name,
-                           sd_bus* bus_type, const bool bmc_fru);
+int validateFRUArea(const uint8_t fruid, const char* fru_file_name,
+                    sd_bus* bus_type, const bool bmc_fru);
 
 #endif