dri: Collapse dri2_validate_egl_image() into dri_validate_egl_image()

Unnecessary indirection.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30245>

src/gallium/frontends/dri/dri_helpers.c

@@ -271,17 +271,6 @@ dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
    return img;
 }
 
-bool
-dri2_validate_egl_image(struct dri_screen *screen, void *handle)
-{
-   const __DRIimageLookupExtension *loader = screen->dri2.image;
-
-   if (loader)
-      return loader->validateEGLImage(handle, screen->loaderPrivate);
-   else
-      return true;
-}
-
 __DRIimage *
 dri2_lookup_egl_image_validated(struct dri_screen *screen, void *handle)
 {

src/gallium/frontends/dri/dri_screen.c

@@ -541,8 +541,12 @@ dri_validate_egl_image(struct pipe_frontend_screen *fscreen,
                        void *egl_image)
 {
    struct dri_screen *screen = (struct dri_screen *)fscreen;
+   const __DRIimageLookupExtension *loader = screen->dri2.image;
 
-   return screen->validate_egl_image(screen, egl_image);
+   if (loader)
+      return loader->validateEGLImage(egl_image, screen->loaderPrivate);
+   else
+      return true;
 }
 
 static int
@@ -623,7 +627,6 @@ dri_init_screen(struct dri_screen *screen,
    screen->base.validate_egl_image = dri_validate_egl_image;
 
    screen->lookup_egl_image = dri2_lookup_egl_image;
-   screen->validate_egl_image = dri2_validate_egl_image;
    const __DRIimageLookupExtension *image = screen->dri2.image;
    if (image &&
        image->base.version >= 2 &&

src/gallium/frontends/dri/dri_screen.h

@@ -113,7 +113,6 @@ struct dri_screen
 
    /* hooks filled in by dri2 & drisw */
    __DRIimage * (*lookup_egl_image)(struct dri_screen *ctx, void *handle);
-   bool (*validate_egl_image)(struct dri_screen *ctx, void *handle);
    __DRIimage * (*lookup_egl_image_validated)(struct dri_screen *ctx, void *handle);
 
    /* DRI exts that vary based on gallium pipe_screen caps. */