experimenting fix for crash on LNL old driver

Author: rillomas

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -5097,8 +5097,8 @@ static vk_matmul_pipeline ggml_vk_get_mul_mat_mat_id_pipeline(ggml_backend_vk_co
 
     // XXX TODO 'prec' is not actually allowed in mul_mat_id.
     bool prefer_fp16acc = ctx->device->fp16 /*&& prec == GGML_PREC_DEFAULT*/;
-    bool support_fp16acc = ctx->device->pipeline_dequant_mul_mat_mat_id[src0_type].f16acc != nullptr;
-    bool support_fp32acc = ctx->device->pipeline_dequant_mul_mat_mat_id[src0_type].f32acc != nullptr;
+    bool support_fp16acc = ctx->device->coopmat_acc_f16_support;
+    bool support_fp32acc = ctx->device->coopmat_acc_f32_support;
 
     if (support_fp16acc && (prefer_fp16acc || !support_fp32acc)) {
         return ctx->device->pipeline_dequant_mul_mat_mat_id[src0_type].f16acc;