iio: adc: mcp3911: mask out device ID in debug prints

The Device ID should not be included when printing register.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20221010194654.676525-1-marcus.folkesson@gmail.com


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