cuda: skip large batches

cuda panics on batches larger than 1024 so skip those and fallback to
cpu

llama/patches/0036-ggml-cuda-skip-large-batches.patch

@@ -0,0 +1,25 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Michael Yang <git@mxy.ng>
+Date: Tue, 18 Nov 2025 11:13:04 -0800
+Subject: [PATCH] ggml-cuda: skip large batches
+
+cuda panics on batches larger than 1024 so mark it as unsupported to
+fallback to cpu
+---
+ ggml/src/ggml-cuda/ggml-cuda.cu | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/ggml/src/ggml-cuda/ggml-cuda.cu b/ggml/src/ggml-cuda/ggml-cuda.cu
+index f1a20e7fe..1a71e07c9 100644
+--- a/ggml/src/ggml-cuda/ggml-cuda.cu
++++ b/ggml/src/ggml-cuda/ggml-cuda.cu
+@@ -3677,6 +3677,9 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
+                 if (b->type == GGML_TYPE_F16 && a->type != GGML_TYPE_F16) {
+                     return false;
+                 }
++                if (op->op == GGML_OP_MUL_MAT && b->ne[2] * b->ne[3] > 1024) {
++                    return false;
++                }
+ #ifdef GGML_USE_MUSA
+                 const int cc = ggml_cuda_info().devices[dev_ctx->device].cc;
+                 if (b->ne[2]*b->ne[3] > 1 && !ggml_is_transposed(a) && !ggml_is_transposed(b)) {