[ROCm] Add AMD GPU support on Deepseek v3.2 and SparseMLA (#26670)

Signed-off-by: ganyi <ygan@amd.com>

csrc/cache_kernels.cu

@@ -552,7 +552,11 @@ __global__ void indexer_k_quant_and_cache_kernel(
 #ifndef USE_ROCM
   __syncwarp();
 #endif
+#if defined(__gfx942__)
+  float scale = fmaxf(amax, 1e-4) / 224.0f;
+#else
   float scale = fmaxf(amax, 1e-4) / 448.0f;
+#endif
   if (use_ue8m0) {
     scale = exp2f(ceilf(log2f(scale)));
   }