zink: verify geometry shader feature

We shouldn't try to use geometry shaders on implementations that don't
support them. So let's verify the feature before using it.

Fixes: 8028991f36 ("zink: enable gs pipe caps")
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7287>

src/gallium/drivers/zink/zink_screen.c

@@ -380,8 +380,13 @@ zink_get_shader_param(struct pipe_screen *pscreen,
       switch (shader) {
       case PIPE_SHADER_FRAGMENT:
       case PIPE_SHADER_VERTEX:
-      case PIPE_SHADER_GEOMETRY:
          return INT_MAX;
+
+      case PIPE_SHADER_GEOMETRY:
+         if (screen->info.feats.features.geometryShader)
+            return INT_MAX;
+         break;
+
       default:
          break;
       }