treewide: sync bootcount scripts across targets

This commit made the following changes to sync all bootcount scripts:

1. use boot() instead of start()
    This script only needs to be executed once when boot is complete.
    use boot() to make this explicit.

2. drop sourcing of /lib/functions.sh
    This is aready done in /etc/rc.common.

3. ramips: replace board name checking with a case

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/ath79/base-files/etc/init.d/bootcount

@@ -1,4 +1,5 @@
 #!/bin/sh /etc/rc.common
+
 START=99
 
 boot() {

target/linux/ipq40xx/base-files/etc/init.d/bootcount

@@ -2,9 +2,7 @@
 
 START=99
 
-start() {
-	. /lib/functions.sh
-
+boot() {
 	case $(board_name) in
 	alfa-network,ap120c-ac)
 		[ -n "$(fw_printenv bootcount changed 2>/dev/null)" ] &&\

target/linux/ipq806x/base-files/etc/init.d/bootcount

@@ -2,9 +2,7 @@
 
 START=99
 
-start() {
-	. /lib/functions.sh
-
+boot() {
 	case $(board_name) in
 	linksys,ea8500)
 		mtd resetbc s_env || true

target/linux/kirkwood/base-files/etc/init.d/bootcount

@@ -2,9 +2,7 @@
 
 START=99
 
-start() {
-	. /lib/functions.sh
-
+boot() {
 	case $(board_name) in
 	linksys,audi|\
 	linksys,viper)

target/linux/mvebu/base-files/etc/init.d/bootcount

@@ -2,9 +2,7 @@
 
 START=99
 
-start() {
-	. /lib/functions.sh
-
+boot() {
 	case $(board_name) in
 	linksys,caiman |\
 	linksys,cobra |\

target/linux/ramips/base-files/etc/init.d/bootcount

@@ -2,11 +2,10 @@
 
 START=99
 
-start() {
-	. /lib/functions.sh
-
-	local board=$(board_name)
-	if [ $board = "samknows,whitebox-v8" ]; then
+boot() {
+	case $(board_name) in
+	samknows,whitebox-v8)
 		fw_setenv bootcount 0
-	fi
+		;;
+	esac
 }