staging:iio:max1363 - move to channel_spec registration.

V3: move to single chan registration macro. Also introduce some
local macros to greatly reduce code length when setting up the
chan_spec arrays for all the different devices.

V2: update read_raw for two value approach.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --cc drivers/staging/iio/adc/max1363.h
Simple merge

diff --cc drivers/staging/iio/adc/max1363_core.c
Simple merge

diff --cc drivers/staging/iio/adc/max1363_ring.c
Simple merge