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/orion/generic/base-files/etc/uci-defaults/09_hardware

@@ -10,7 +10,7 @@
 # This script sets system defaults for the hardware on firstboot
 #
 
-hardware=`sed -n /Hardware/s/.*:.//p /proc/cpuinfo`
+. /lib/functions.sh
 
 wrt350nv2_default() {
 # leds
@@ -47,7 +47,7 @@ __EOF
 	}
 }
 
-case "${hardware}" in
+case "$(board_name)" in
  'Linksys WRT350N v2')
 	wrt350nv2_default
 	;;

target/linux/orion/generic/base-files/lib/upgrade/platform.sh

@@ -8,7 +8,7 @@
 platform_check_image() {
 	[ "${ARGC}" -gt 1 ] && { echo 'Too many arguments. Only flash file expected.'; return 1; }
 
-	local hardware=`sed -n /Hardware/s/.*:.//p /proc/cpuinfo`
+	local hardware="$(board_name)"
 	local magic="$(get_magic_word "$1")"
 	local magic_long="$(get_magic_long "$1")"