Kevin O'Connor 63dffd9307 spi_temperature: Provide a default value for spi_speed
All of the Maxim chips support a 4Mhz spi transfer rate, so use that
as a default spi speed.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2018-07-24 15:49:14 -04:00
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