Change in osmo-ccid-firmware[master]: switch UART debug to SIM7

Kévin Redon has abandoned this change. ( https://gerrit.osmocom.org/13053 ) Change subject: switch UART debug to SIM7 .. Abandoned SERCOM7 will be used as UART debug for now (R&D) and can be replaced in the future with SWO --

Change in osmo-ccid-firmware[master]: switch UART debug to SIM7

Kévin Redon has uploaded this change for review. ( https://gerrit.osmocom.org/13053 Change subject: switch UART debug to SIM7 .. switch UART debug to SIM7 SERCOM7 will mainly be used for the SIM7 interface. only if SIM7 is not