Update bootimg-partition to use bootimg_dir instead of img_deploy_dir,
to match similar usage in other plugins.
As mentioned elsewhere, plugins should use the passed-in value for
bootimg_dir directly if non-null, which corresponds to a user-assigned
value specified via a -b command-line param, and only fetch the value
from bitbake if that value is null.
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
