iio: light: vcnl4000: Fix integration interval for vcnl4040

According to the data sheet it's 0.12 lux/step, not 0.024 lux/step as
with the vcnl4200.

See p. 8 in https://www.vishay.com/docs/84307/designingvcnl4040.pdf

Broken-by: 5a441aad
Signed-off-by: Guido Günther <agx@sigxcpu.org>
2 jobs for mrs/vcnl4040-int in 59 minutes and 9 seconds (queued for 2 seconds)
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