layer.conf: Raise the meta-anvl layer's priority

Change the priority of the meta-anvl from 1 to 8
so that its recipes are used before any of the
more generic ones.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
collection: Change collection name to 'anvl'

Change the collection name from 'liambreck' to 'anvl'.
While at it, remove commented out 'BBFILES' line and
change the value of 'BBFILE_PATTERN_anvl' to match
what most other meta layers have.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
machine & kernel: Create new ANVL machine and add kernel source

Create a new "machine" for the ANVL board.
This requires that the kernel for the ANVL
board be added too.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
u-boot: Build the ANVL-specific u-boot code

Have the ANVL machine build the ANVL-specific
u-boot code.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
README.md: Update instructions and notes

Update the README.md file to reflect the slightly
altered instructions and additional notes.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>