Rename hi3518ev300_lite_bathhouse to yuancam-dgk423403 (#153)

The device is a YuanCam-branded (HQLS/hdwificam OEM) HI3518EV300 board —
confirmed on a lab unit via its Factory.bin/SysParam.bin tags
("YuanCamFactory"/"YuanCamSysparam") and its P2P device id
(DGK-423403-YZHGE). Rename the placeholder "Bathhouse" profile to a
proper vendor-model name and fill in the sensor, identified on hardware
with ipctool as JXH62 (previously "?" in the README table). The
defconfig, customizer.sh and excludes list carry over unchanged except
for the upgrade URL, which now points at the renamed release asset.

devices/hi3518ev300_lite_yuancam-dgk423403/general/overlay/usr/share/openipc/customizer.sh

@@ -5,7 +5,7 @@
 #
 # Set custom upgrade url
 #
-fw_setenv upgrade 'https://github.com/OpenIPC/builder/releases/download/latest/hi3518ev300_lite_bathhouse-nor.tgz'
+fw_setenv upgrade 'https://github.com/OpenIPC/builder/releases/download/latest/hi3518ev300_lite_yuancam-dgk423403-nor.tgz'
 fw_setenv wlandev rtl8188fu-generic
 #
 #