fff-nodewatcher: add platform as chipset

On some devices cpuinfo returns no "system type". For that devices the
"platform" tag contains the relevant chipset information.

Signed-off-by: Tim Niemeyer <tim@tn-x.org>
Reviewed-by: Jan Kraus <mayosemmel@gmail.com>
Reviewed-by: Tobias Klaus <tk+ff@meskal.net>

src/packages/fff/fff-nodewatcher/files/usr/sbin/nodewatcher

@@ -84,6 +84,7 @@ crawl() {
     cpu=$(awk -F': ' '
         /model/ { printf "<cpu>"$2"</cpu>" }
         /system type/ { printf "<chipset>"$2"</chipset>" }
+        /platform/ { printf "<chipset>"$2"</chipset>" }
     ' /proc/cpuinfo)
     model="<model>$(cat /var/sysinfo/model)</model>"
     local_time="`date +%s`"