hwmon: (adt7470) Replace power-of-two test
Since <linux/log2.h> already supplies a power-of-two test, there's no point in having this source file redefine it again. Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca> Acked-by: NJean Delvare <khali@linux-fr.org> Signed-off-by: NMark M. Hoffman <mhoffman@lightlink.com>
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