This patch converts all apm821xx devices to the device-tree
board-detection method. All instances of the legacy
boardnames (mbl,mr24,...) are converted to "vendor,device"
identifier.
The custom board-detection code in apm821xx.sh is removed as
it no longer serves any purpose.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>