Match Occupancy APIs syntax with CUDA (#1625)

* Match Occupancy APIs syntax with CUDA and fix tests using these APIs


[ROCm/hip commit: fa98798b63]

projects/hip/samples/2_Cookbook/13_occupancy/occupancy.cpp

@@ -86,8 +86,8 @@ void launchKernel(float* C, float* A, float* B, bool manual){
      printf("kernel Execution time = %6.3fms\n", eventMs);
 
      //Calculate Occupancy
-     uint32_t numBlock = 0;
-     HIP_CHECK(hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock, multiply, blockSize, 0));
+     int numBlock = 0;
+     HIP_CHECK(hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock, multiply,(int)blockSize, 0));
      
      if(devProp.maxThreadsPerMultiProcessor){
 	std::cout << "Theoretical Occupancy is " << (double)numBlock* blockSize/devProp.maxThreadsPerMultiProcessor * 100 << "%" << std::endl;