Adding power schedule addon and RTC modules

Removing null update URLs

files/board/arpl/p3/addons/powersched/manifest.yml

@@ -0,0 +1,16 @@
+version: 1
+name: powersched
+system: true
+description: "Utility to configure RTC according to DSM power schedule"
+compile-script: compile.sh
+all:
+  install-script: "install.sh"
+  copy: "all"
+available-for:
+  bromolow-3.10.108:
+  apollolake-4.4.180:
+  broadwell-4.4.180:
+  broadwellnk-4.4.180:
+  denverton-4.4.180:
+  geminilake-4.4.180:
+  v1000-4.4.180: