RDKBACCL-1887: Port sysint scripts for ARM system ready

[mahanteshchitt]

Reason for change: Migrate scripts from BPI to ARM system ready
Test Procedure: Image should bootup and all functionality should work
Risks: Low

[Copilot]

Pull request overview

This PR ports existing “rpi/bpi”-specific init/service behaviors to a new BOX_TYPE=genericarm target to support ARM SystemReady images booting with the expected LAN/WAN/DHCP/mcast behavior.

Changes:

• Extend multiple service scripts’ platform conditionals to treat genericarm similarly to rpi/bpi.
• Update DHCP/LAN/forwarding flow gating so genericarm triggers the same lan-status and restart behavior paths.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
source/scripts/init/service.d/service_mcastproxy.sh	Adds genericarm to igmpproxy launch logic for the expected platform branch.
source/scripts/init/service.d/service_ipv4.sh	Ensures genericarm participates in rpi/bpi-specific lan-status handling.
source/scripts/init/service.d/service_forwarding.sh	Aligns WAN/LAN restart behavior for genericarm with rpi/bpi handling.
source/scripts/init/service.d/service_dhcp_server/dhcp_server_functions.sh	Includes genericarm in DHCP helper logic for starting lan-status under certain conditions.
source/scripts/init/service.d/service_dhcp_server.sh	Extends DHCP-server start/retry and LAN refresh behaviors to genericarm.
source/scripts/init/service.d/lan_handler.sh	Extends LAN init/start special-casing to include genericarm.

Comments suppressed due to low confidence (2)

source/scripts/init/service.d/service_mcastproxy.sh:120

• The BOX_TYPE check is a very long chain of test expressions and mixes = and == under a #!/bin/sh script, which makes this branch harder to maintain and potentially less portable across /bin/sh implementations. A case statement is simpler and avoids repeated [ ... ] calls.

   if [ "$BOX_TYPE" = "HUB4" ] || [ "$BOX_TYPE" = "SR300" ] || [ "$BOX_TYPE" = "SE501" ] || [ "$BOX_TYPE" = "SR213" ] || [ "$BOX_TYPE" == "WNXL11BWL" ] || [ "$BOX_TYPE" == "rpi" ] || [ "$BOX_TYPE" == "bpi" ] || [ "$BOX_TYPE" == "genericarm" ] || [ "$BOX_TYPE" == "SCER11BEL" ] || [ "$BOX_TYPE" == "SCXF11BFL" ]; then
       $BIN $CONF_FILE &
   else 
       $BIN -c $CONF_FILE &
   fi

source/scripts/init/service.d/service_dhcp_server/dhcp_server_functions.sh:1140

• By adding genericarm to this platform-specific block, the following bridge-mode check becomes relevant for that platform as well. The test [ $BRIDGE_MODE == 0 ] is not POSIX (==) and will also throw a syntax error if syscfg get bridge_mode returns an empty string (unquoted variable).

   if [ "$BOX_TYPE" = "rpi" ] || [ "$BOX_TYPE" = "bpi" ] || [ "$BOX_TYPE" = "turris" ] || [ "$BOX_TYPE" = "genericarm" ]; then
	   LAN_STATUS=`sysevent get lan-status`
	   BRIDGE_MODE=`syscfg get bridge_mode`
	   if [ "$LAN_STATUS" = "stopped" ] && [ $BRIDGE_MODE == 0 ]; then                
		   echo_t "DHCP_SERVER : Starting lan-status"

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