bb.org: add python-serial package

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
bb.org: use xinput-calibrator package

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
bb.org: we are not building xinput_calibrator so drop this

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
card: better kms override documentation

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
bb.org: cleanup: this is now a package

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>