refactor: replace PCM_CPU_FAMILY_MODEL macro with constexpr function

Change-Id: Ifcebbed44cc78a8e35728fe6cdb7a2610f926f8a

Author: rdementi

src/cpucounters.h

@@ -584,6 +584,11 @@ typedef SimpleCounterState IDXCounterState;
 
 typedef std::vector<uint64> eventGroup_t;
 
+inline constexpr int PCM_CPU_FAMILY_MODEL(int family_, int model_)
+{
+    return ((family_) << 8) + (model_);
+}
+
 class PerfVirtualControlRegister;
 
 /*!
@@ -1896,8 +1901,6 @@ class PCM_API PCM
     */
     static int getCPUFamilyModelFromCPUID();
 
-    #define PCM_CPU_FAMILY_MODEL(family_, model_) (((family_) << 8) + (model_))
-
     //! \brief Identifiers of supported CPU models
     enum SupportedCPUModels
     {