ptxd_lib_colgen: fix collections

'340ed9a9cac3d5e387bb660e27624dbd6105c0ba ptxd_lib_kgen: optimize' changed
the path where the files are generated and broke this.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
ptxdist: fix '--auto-version' for older ptxdist versions

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
ptxd_make_dts_dtb: one more include dir

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>