vo_gpu/d3d11: add an option for the adapter name

Set it from the adapter name in the d3d11 options.

video/out/d3d11/context.c

@@ -314,6 +314,7 @@ static bool d3d11_init(struct ra_ctx *ctx)
         .force_warp = p->opts->warp == 1,
         .max_feature_level = p->opts->feature_level,
         .max_frame_latency = ctx->vo->opts->swapchain_depth,
+        .adapter_name = p->opts->adapter_name,
     };
     if (!mp_d3d11_create_present_device(ctx->log, &dopts, &p->device))
         goto error;

video/out/gpu/d3d11_helpers.h

@@ -52,6 +52,11 @@ struct d3d11_device_opts {
     // not supported, device creation will fail.
     // If unset, defaults to D3D_FEATURE_LEVEL_9_1
     int min_feature_level;
+
+    // The adapter name to utilize if a specific adapter is required
+    // If unset, the default adapter will be utilized when creating
+    // a device.
+    char *adapter_name;
 };
 
 bool mp_d3d11_create_present_device(struct mp_log *log,