local: Simplify code
local: Simplify code

iio_device_get_sample_size_mask(dev, dev->mask, dev->words)
is the exact same as:
iio_device_get_sample_size(dev)

Signed-off-by: Paul Cercueil <a027184a55211cd23e3f3094f1fdc728df5e0500@crapouillou.net>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio