fix: initialize HIP linking in the parent CMake scope

CMakeLists.txt

@@ -365,6 +365,9 @@ if (SD_CUDA)
 endif()
 set(SD_BACKEND_REGISTRATIONS)
 if (NOT SD_USE_UPSTREAM_GGML AND (SD_CUDA OR SD_HIPBLAS OR SD_MUSA))
+    if(SD_HIPBLAS)
+        include(cmake/hip.cmake)
+    endif()
     add_subdirectory(src/core/cuda)
     foreach(VENDOR CUDA HIP MUSA)
         if(SD_${VENDOR} OR (VENDOR STREQUAL "HIP" AND SD_HIPBLAS))