rocr: Prevent int overflow in arithmetic operation

Cast range->x and range->y to uint64_t before performing multiplication

Signed-off-by: Alysa Liu <Alysa.Liu@amd.com>

runtime/hsa-runtime/core/runtime/amd_blit_sdma.cpp

@@ -646,7 +646,7 @@ BlitSdma<RingIndexTy, HwIndexMonotonic, SizeToCountOffset, useGCR>::SubmitCopyRe
     BuildCopyRectCommand(append, dst, dst_offset, src, src_offset, range);
   }
 
-  uint64_t size = range->x * range->y * range->z;
+  uint64_t size = static_cast<uint64_t>(range->x) * static_cast<uint64_t>(range->y) * range->z;
 
   std::vector<core::Signal*> gang_signals(0);