Benjamin Valentin 2647f5f3c2 cpu/fe310: run RTT at 1 Hz if RTC is selected
The RTC on the fe310 is emulated using the RTT.
This only works if the RTT frequency is 1 Hz, so default to that
value in case `periph_rtc` is selected.
2020-09-27 22:45:04 +02:00
..
2020-09-01 14:39:55 +02:00
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2020-09-01 14:39:55 +02:00