treewide: use only board_name function to get name

Do not parse /tmp/sysinfo/board_name, /proc/cpuinfo or the device tree
compatible string directly. Always use the board_name function to get
the board name.

The admswconfig package still reads /proc/cpuinfo directly. The code
looks somehow broken and the whole adm5120 which uses this package
looks unmaintained. Leave it as it is for now.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/apm821xx/base-files/lib/preinit/79_move_config

@@ -3,7 +3,9 @@
 BOOTPART=/dev/sda1
 
 move_config() {
-	grep -q 'MyBook Live' /proc/cpuinfo || return
+	. /lib/functions.sh
+
+	[ "$(board_name)" = "mbl" ] || return
 	if [ -b $BOOTPART ]; then
 		mkdir -p /boot
 		mount -t ext4 -o rw,noatime $BOOTPART /boot

target/linux/apm821xx/base-files/lib/upgrade/merakinand.sh

@@ -52,7 +52,7 @@ merakinand_do_platform_check() {
 
 merakinand_do_upgrade() {
 	local tar_file="$1"
-	local board_name="$(cat /tmp/sysinfo/board_name)"
+	local board_name="$(board_name)"
 
 	# Do we need to do any platform tweaks?
 	case "$board_name" in