egl: move is_render_node flag to platform_wayland

This flag is being used only by platform_wayland. So move it to be
included by the #ifdef HAVE_WAYLAND_PLATFORM in struct dri2_egl_display.

Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25504>

src/egl/drivers/dri2/egl_dri2.h

@@ -307,6 +307,7 @@ struct dri2_egl_display {
    bool authenticated;
    uint32_t capabilities;
    char *device_name;
+   bool is_render_node;
 #endif
 
 #ifdef HAVE_ANDROID_PLATFORM
@@ -314,8 +315,6 @@ struct dri2_egl_display {
    /* gralloc vendor usage bit for front rendering */
    uint32_t front_rendering_usage;
 #endif
-
-   bool is_render_node;
 };
 
 struct dri2_egl_context {

src/egl/drivers/dri2/platform_drm.c

@@ -632,8 +632,6 @@ dri2_initialize_drm(_EGLDisplay *disp)
    disp->Device = dev;
 
    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
-   dri2_dpy->is_render_node =
-      drmGetNodeTypeFromFd(dri2_dpy->fd_render_gpu) == DRM_NODE_RENDER;
 
    if (!dri2_load_driver_dri3(disp)) {
       err = "DRI3: failed to load driver";