Fix hipExtLaunchMultiKernelMultiDevice refactoring. (#1714)

- Use the correct condition for HIP VDI runtime.

[ROCm/hip commit: e9da934ac6]

projects/hip/include/hip/hcc_detail/hip_runtime_api.h

@@ -2956,7 +2956,7 @@ hipError_t hipOccupancyMaxActiveBlocksPerMultiprocessor(
 hipError_t hipOccupancyMaxActiveBlocksPerMultiprocessorWithFlags(
    uint32_t* numBlocks, hipFunction_t f, uint32_t blockSize, size_t dynSharedMemPerBlk, unsigned int flags);
 
-#if defined(__clang__) && defined(__HIP__)
+#if __HIP_VDI__
 /**
  * @brief Launches kernels on multiple devices and guarantees all specified kernels are dispatched
  * on respective streams before enqueuing any other work on the specified streams from any other threads