[AMD] Fix AMD Multimodal Test - skip nvfp4 tests (#23045)

python/sglang/multimodal_gen/test/server/gpu_cases.py

@@ -361,6 +361,11 @@ if not current_platform.is_hip():
             T2V_sampling_params,
         )
     )
+# Skip all ModelOpt tests on AMD: FP8 requires torch._scaled_mm (HIPBLAS_STATUS_NOT_SUPPORTED
+# on ROCm), NVFP4 requires flashinfer or sgl_kernel FP4 kernels (CUDA-only)
+if current_platform.is_hip():
+    ONE_GPU_CASES_C = []
+else:
     ONE_GPU_CASES_C = [
         _make_modelopt_ci_case(
             "flux1_modelopt_fp8_t2i",