The DEVICE_PACKAGES are not included in the initramfs image in case
TARGET_PER_DEVICE_ROOTFS is set. This might produces initramfs images
with a not working network configuration because of a missing swconfig.
Workaround the issues by adding the essential swconfig package to the
default packages selection and deselect swconfig for boards not having
swconfig included before via device packages.
Signed-off-by: Mathias Kresin <dev@kresin.me>
5cdbc86329