rocr: Fix IPC dmabuf hang with large allocations (#1945)

Changed ipc_sock_server_conns_ map's value type to size_t. Previous
type of int caused allocations of sizes greater than 2GB to overflow,
causing the message len to be stored as a negative value, preventing the
IPC server from exporting dmabuf file descriptors, which lead to hangs.

Signed-off-by: Sunday Clement <Sunday.Clement@amd.com>

projects/rocr-runtime/runtime/hsa-runtime/core/inc/runtime.h

@@ -894,7 +894,7 @@ class Runtime {
 
   // IPC DMA buf unix domain socket server dmabuf FD passing
   int ipc_sock_server_fd_;
-  std::map<uint64_t, int> ipc_sock_server_conns_;
+  std::map<uint64_t, size_t> ipc_sock_server_conns_;
   KernelMutex ipc_sock_server_lock_;
 
  private: