Remove hip-hcc codes: Part three

1.Rename include/hip/hcc_detail/ as include/hip/amd_detail/

2.Rename include/hip/nvcc_detail/ as include/hip/nvidia_detail/

3.Create __HIP_PLATFORM_AMD__ to replace __HIP_PLATFORM_HCC__

4.Create __HIP_PLATFORM_NVIDIA__ to replace __HIP_PLATFORM_NVCC__

After hcc_detail, nvcc_detail, __HIP_PLATFORM_HCC__ and __HIP_PLATFORM_NVCC__
have been removed from upstream, they will be removed from hip runtime.

Change-Id: I1ae457effd739d6c25bca203c1724b026be21fce

hipamd/include/hip/hip_ext.h

@@ -102,7 +102,7 @@ inline void hipExtLaunchKernelGGL(F kernel, const dim3& numBlocks, const dim3& d
     hipExtLaunchKernel(k, numBlocks, dimBlocks, _Args, sharedMemBytes, stream, startEvent,
                        stopEvent, (int)flags);
 }
-#elif defined(__HIP_PLATFORM_HCC__) && GENERIC_GRID_LAUNCH == 1 && defined(__HCC__)
+#elif (defined(__HIP_PLATFORM_HCC__) || defined(__HIP_PLATFORM_AMD__)) && GENERIC_GRID_LAUNCH == 1 && defined(__HCC__)
 //kernel_descriptor and hip_impl::make_kernarg are in "grid_launch_GGL.hpp"
 
 namespace hip_impl {