feat: add linear and attention scale overrides (#1964)

src/model/diffusion/ltxv.hpp

@@ -709,8 +709,7 @@ namespace LTXV {
                 k = apply_hidden_rope(ctx->ggml_ctx, k, k_pe, heads, dim_head, rope_interleaved);
             }
 
-            auto out = ggml_ext_attention_ext(ctx->ggml_ctx,
-                                              ctx->backend,
+            auto out = ggml_ext_attention_ext(ctx,
                                               q,
                                               k,
                                               v,