This makes the linux-raspberrypi_dev recipe more flexible by allowing
the kernel branch to be overridden in local.conf.
Signed-off-by: Paul Barker <pbarker@toganlabs.com>
The development branches of linux-raspberrypi are rebased frequently. To
avoid fetch failures caused by out-of-date git hashes we need to use
AUTOREV.
LINUX_VERSION may need to be overridden in local.conf to match the
upstream version.
Signed-off-by: Paul Barker <pbarker@toganlabs.com>
