Francisco Molina 5e47fc7e22 cpu: do not auto-select ztimer_periph_rtt for sam0, fe310
The sam0 rtt busy loops for 180us every time an alarm is set or
the counter is read, this propagates and leads to timing errors
on ztimer_msec that are higher than > +-1msec.

The same goes for fe310.
2021-12-14 18:43:53 +01:00
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2017-10-09 12:06:35 +02:00
2017-10-09 12:06:35 +02:00
2018-06-11 19:12:02 +02:00