panfrost: Log when an unusable group caused a context re-initialization

Useful to track GPU context re-initialization.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31868>

src/gallium/drivers/panfrost/pan_csf.c

@@ -580,6 +580,7 @@ csf_check_ctx_state_and_reinit(struct panfrost_context *ctx)
                                ? PIPE_INNOCENT_CONTEXT_RESET
                                : PIPE_GUILTY_CONTEXT_RESET);
 
+   mesa_loge("Group became unusable, re-initializing context");
    panfrost_context_reinit(ctx);
 }