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.cpp b/writefrudata.cpp
index 704df12..84d7527 100644
--- a/writefrudata.cpp
+++ b/writefrudata.cpp
@@ -581,8 +581,8 @@
 ///-----------------------------------------------------
 // Accepts the filename and validates per IPMI FRU spec
 //----------------------------------------------------
-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)
 {
     size_t data_len = 0;
     size_t bytes_read = 0;