If the number of endpoints is not sufficient for an application, it should not be silently ignored and cause a non-working application. Rather, should cause an assertion as it is a configuration issue.
The board reset function `usb_board_reset_coding_cb` can be used on any CDC ACM interface. It is not necessary that the highlevel STDIO is used. Therefore, the call of the board reset function `usb_board_reset_coding_cb` has been moved from the USBUS STDIO CDC ACM implementation to USBUS CDC ACM implementation and is thus a feature of the USBUS CDC ACM interface that don't require any other functionality.
This adds a sanity check to the line coding request of the CDC ACM code
to chcek the length parameter in the setup request with the size of the
expected payload struct
The SetLineCoding request is optional to support (CDC PSTN subclass). No
need to claim to support it to the host and actually discard the data if
it is not supported by the implementation.
