meta-ibm: systemd: add empty hardware watchdog config

Change Ic46bcd9b8576530be7dcdda51384e1052d4a78f1 added hardware
watchdog support to all platforms but this conflicts with meta-ibm
support provided by fan-watchdog.bb.  For the time being, supply a
disabled config file which will override the meta-phosphor version
so that systemd does not interact with the watchdog.

Change-Id: Ic6a587d8bab217cee8fbd421a8b6d6e3bd026631
diff --git a/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf b/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf
new file mode 100644
index 0000000..42ca55e
--- /dev/null
+++ b/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf
@@ -0,0 +1,3 @@
+[Manager]
+#RuntimeWatchdogSec=120s
+#WatchdogDevice=/dev/watchdog