LtRtProcessing: Make ClampFull() internally linked

inline provides external linkage instead of internal linkage which is
more desirable here. We can enclose it within an anonymous namespace to
make it internally linked.

lib/audiodev/LtRtProcessing.cpp

@@ -1,14 +1,15 @@
-#include "LtRtProcessing.hpp"
-#include <cmath>
+#include "lib/audiodev/LtRtProcessing.hpp"
+
 #include <algorithm>
+#include <cmath>
 
 #undef min
 #undef max
 
 namespace boo {
-
+namespace {
 template <typename T>
-inline T ClampFull(float in) {
+T ClampFull(float in) {
   if (std::is_floating_point<T>()) {
     return std::min<T>(std::max<T>(in, -1.f), 1.f);
   } else {
@@ -23,6 +24,7 @@ inline T ClampFull(float in) {
       return in;
   }
 }
+} // Anonymous namespace
 
 #if INTEL_IPP