systemd: Enable the hardware watchdog for the IDU as well

The built-in watchdog even allows setting the watchdog interval

recipes-fixes/systemd/systemd/sysmocom-idu/system.conf

@@ -0,0 +1,43 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+# See systemd.conf(5) for details
+
+[Manager]
+#LogLevel=info
+#LogTarget=journal-or-kmsg
+#LogColor=yes
+#LogLocation=no
+#DumpCore=yes
+#CrashShell=no
+#ShowStatus=yes
+#CrashChVT=1
+#CPUAffinity=1 2
+#DefaultControllers=cpu
+#DefaultStandardOutput=journal
+#DefaultStandardError=inherit
+#JoinControllers=cpu,cpuacct,cpuset net_cls,net_prio
+RuntimeWatchdogSec=60
+ShutdownWatchdogSec=60
+#CapabilityBoundingSet=
+#TimerSlackNSec=
+#DefaultLimitCPU=
+#DefaultLimitFSIZE=
+#DefaultLimitDATA=
+#DefaultLimitSTACK=
+#DefaultLimitCORE=
+#DefaultLimitRSS=
+#DefaultLimitNOFILE=
+#DefaultLimitAS=
+#DefaultLimitNPROC=
+#DefaultLimitMEMLOCK=
+#DefaultLimitLOCKS=
+#DefaultLimitSIGPENDING=
+#DefaultLimitMSGQUEUE=
+#DefaultLimitNICE=
+#DefaultLimitRTPRIO=
+#DefaultLimitRTTIME=

recipes-fixes/systemd/systemd_sysmocom.inc

@@ -10,6 +10,7 @@ SRC_URI += "file://journald.conf \
 SRC_URI_append_sysmobts-v1 = " file://system.conf"
 SRC_URI_append_sysmobts-v2 = " file://system.conf"
 SRC_URI_append_sysmocom-odu = " file://system.conf"
+SRC_URI_append_sysmocom-idu = " file://system.conf"
 
 # Disable depedency on dbus
 RDEPENDS_${PN}_remove = "dbus"