GCC 9 complained about stringop-truncation which is a cautionary message
to prevent using strncpy with non-null terminated strings.
We can fix this by copying one byte less than the destination size and
then manually adding the null termination, as we already do.
Device port can be set via SENS_EN_CM8JL65 parameter:
SENS_EN_CM8JL65 = 0 -> Disabled
SENS_EN_CM8JL65 = 1 -> Enabled on TELEM2
SENS_EN_CM8JL65 = 2 -> Enabled on TELEM1
Signed-off-by: Claudio Micheli <claudio@auterion.com>