tree 26b9de97c354cb6bb673c597041dcebdf29cdc57
parent 4cb8e325c80be034a3f60b4b334627ed5a822f40
author Kévin Redon <kredon@sysmocom.de> 1548349033 +0100
committer Kévin Redon <kredon@sysmocom.de> 1549551365 +0100

add SERCOM peripheral for UART debug

currently only the SERCOM peripheral driver is added an configured,
but it is not being used.
UART debug will be done through the EDBG COM port, on PB24/PB25 of
SAM E54 Xplained Pro board

Change-Id: Id7af37ce1dd2d0a356e019c96bf6438ce459411b