clang-error: fix clang-diagnostic-inconsistent-missing-override error

This clang-error is generated when a function overrides a member
function but is not marked 'override'.

Change-Id: I664941c2dff5be93dec1571cc974fae2168925f2
Signed-off-by: Pavithra Barithaya <pavithra.b@ibm.com>
diff --git a/libpldmresponder/bios_integer_attribute.hpp b/libpldmresponder/bios_integer_attribute.hpp
index 5d342c6..114b24a 100644
--- a/libpldmresponder/bios_integer_attribute.hpp
+++ b/libpldmresponder/bios_integer_attribute.hpp
@@ -61,7 +61,7 @@
         Table& attrValueEntry) override;
 
     int updateAttrVal(Table& newValue, uint16_t attrHdl, uint8_t attrType,
-                      const pldm::utils::PropertyValue& newPropVal);
+                      const pldm::utils::PropertyValue& newPropVal) override;
 
   private:
     /** @brief Integer field from json */