hwmon: (pmbus/ltc2978) Fix temperature reporting
On LTC2978, only READ_TEMPERATURE is supported. It reports the internal junction temperature. This register is unpaged. On LTC3880, READ_TEMPERATURE and READ_TEMPERATURE2 are supported. READ_TEMPERATURE is paged and reports external temperatures. READ_TEMPERATURE2 is unpaged and reports the internal junction temperature. Signed-off-by: NGuenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # 3.2+ Acked-by: NJean Delvare <khali@linux-fr.org>
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