ssc325: add Chuangmi IPC017 device profile (SSC323, GC2053, MT7601U, 16M NOR) (#168)

Xiaomi/Chuangmi ipc017 kept on its vendor U-Boot. A kernel fragment appends mtdparts= with the vendor MXP offsets under OpenIPC's names plus panic=20, and carves a separate 64 KB env out of the end of the vendor DATA partition, because the vendor environment shares its erase block with the end of U-Boot. S01fwenv points fw_env.config at that partition. wireless/usb powers the MT7601U on GPIO 14 and bind-mounts a /tmp copy of MT7601USTA.dat with the factory MAC from FACTORY. S41eth0 takes the connector-less eth0 down so ONVIF discovery goes out on wlan0. Tested on hardware.

.github/firmware-drift.json

@@ -434,6 +434,13 @@
       "reconciled": "2026-08-25",
       "note": "vendor driver loader; firmware#2307 updated its sensor list"
     },
+    {
+      "builder": "devices/ssc325_lite_chuangmi-ipc017/general/overlay/etc/wireless/usb",
+      "firmware": "general/overlay/etc/wireless/usb",
+      "blob": "f9df96bc190e8f8a11794f9410568eac10f50320",
+      "reconciled": "2026-09-25",
+      "note": "only the mt7601u-ssc325-chuangmi-ipc017 arm"
+    },
     {
       "builder": "devices/ssc325_lite_imou-c22cp/general/overlay/etc/wireless/usb",
       "firmware": "general/overlay/etc/wireless/usb",