SERIAL_AUTO_CR inconsistently implemented

[bennoleslie]

In some implementation (rockpro64) the CR is sent after the LF, while in others (such as imx) it is sent prior to the LF.

I think it should be sent prior (as in, imx is correct). Is there a reason the rockpro64 is implemented differently?

[axel-h]

yes this is a copy&paste bug that keeps spreading. I've already upstreamed a few patches that fix this for the platform I have access to.

See also #38 (comment)