Replace __HIP_PLATFORM_HCC__ with __HIP_PLATFORM_AMD__ (#1154)

[ROCm/rccl commit: 9e0c9b4ed8]

projects/rccl/src/device/msccl_kernel_impl.h

@@ -48,7 +48,7 @@ extern __shared__ struct mscclShmemData mscclShmem;
 #endif
 
 inline __device__ static void barrier(int nthreads) {
-#if defined(__HIP_PLATFORM_HCC__) || defined(__HCC__) || defined(__HIPCC__)
+#if defined(__HIP_PLATFORM_AMD__) || defined(__HCC__) || defined(__HIPCC__)
   assert(nthreads == NCCL_MAX_NTHREADS);
   __asm__ __volatile__("s_waitcnt vmcnt(0) lgkmcnt(0)\ns_barrier");
 #else