[RTC] Update HW clock before start of chrony (#24584)

[RTC] Update HW clock before start of chrony

Author: vivekrnv

files/image_config/chrony/chrony-config.sh

@@ -1,5 +1,11 @@
 #!/bin/bash
 
+hwclock --show &> /dev/null
+if [ $? -ne 0 ]; then
+    echo "hwclock --show failed, attempting hwclock --systohc..."
+    hwclock --systohc
+fi
+
 sonic-cfggen -d -t /usr/share/sonic/templates/chrony.conf.j2 >/etc/chrony/chrony.conf
 sonic-cfggen -d -t /usr/share/sonic/templates/chrony.keys.j2 >/etc/chrony/chrony.keys
 chmod o-r /etc/chrony/chrony.keys