virgl: Only progagate the uniform numbers if the numbers are actually right

When the field was first introduces, the numbers were reporting the number of
vec4 instead of the number of float. Do not propagate them if they are wrong.

Fixes: d92c1ca01b

Signed-off-by: Corentin Noël <corentin.noel@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17415>

src/gallium/drivers/virgl/virgl_screen.c

@@ -421,6 +421,8 @@ virgl_get_shader_param(struct pipe_screen *screen,
       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
          return 32;
       case PIPE_SHADER_CAP_MAX_CONST_BUFFER0_SIZE:
+         if (vscreen->caps.caps.v2.host_feature_check_version < 12)
+            return 4096 * sizeof(float[4]);
          return vscreen->caps.caps.v2.max_const_buffer_size[shader];
       case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
          if (shader == PIPE_SHADER_FRAGMENT || shader == PIPE_SHADER_COMPUTE)