Vendor the command set the menu and shell depend on

bin/blob-hw-nvidia-without-gsp

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# blob:summary=Detect whether the computer has an NVIDIA GPU without GSP firmware (Maxwell/Pascal/Volta).
+
+# Bounded at both ends, because the callers install the 580xx driver on a match
+# and it supports exactly this span. GSP firmware arrived with Turing, which is
+# also where device IDs cross 0x1e00. Maxwell opens at 0x1340, one ID after the
+# last Kepler part; anything older needs a legacy driver we don't package.
+#
+# Read the cached sysfs IDs rather than lspci, which reads PCI config space and
+# resumes runtime-suspended GPUs.
+pci_devices_path="${BLOB_PCI_DEVICES_PATH:-/sys/bus/pci/devices}"
+
+shopt -s nullglob
+
+for device in "$pci_devices_path"/*; do
+  [[ $(< "$device/vendor") == "0x10de" ]] || continue
+  [[ $(< "$device/class") == 0x03* ]] || continue
+  device_id=$(< "$device/device")
+  (( device_id >= 0x1340 && device_id < 0x1e00 )) && exit 0
+done
+
+exit 1