Fix some naming mismatch of amath/armpl introduced in AdaptiveCpp#1949

Author: thomasRoglin

include/hipSYCL/compiler/llvm-to-backend/Utils.hpp

@@ -378,7 +378,7 @@ std::string getLLDPath();
 std::string getOptPath();
 std::string getLibSvmlDir();
 std::string getLibSleefDir();
-std::string getLibArmplDir();
+std::string getLibAmathDir();
 std::string getLibMvecDir();
 std::string getBitcodePath();
 std::string getRedistPackageBitcodePath(const std::string& backend);

src/compiler/llvm-to-backend/host/LLVMToHost.cpp

@@ -375,7 +375,7 @@ bool LLVMToHostTranslator::translateToBackendFormat(llvm::Module &FlavoredModule
       break;
 
     case host_vector_math_library::armpl:
-#ifdef ARMPL_AVAILABLE
+#ifdef AMATH_AVAILABLE
       amathDir = getLibAmathDir();
       if (!amathDir.empty()) {
         LldInvocation.push_back("-L");