iio: adc: qcom-spmi-adc5: fix driver name

Remove superfluous '.c' from qcom-spmi-adc5 device driver name.
Fixes: e13d7572 ("iio: adc: Add QCOM SPMI PMIC5 ADC driver")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200910140000.324091-2-dmitry.baryshkov@linaro.org


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>