dt-bindings:iio:health:maxim,max30102: txt to yaml conversion

Straight forward binding.  Title was a bit of a challenge to keep short
as this binding covers sensors for two entirely different purposes.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Cc: Matt Ranostay <mranostay@gmail.com>
Link: https://lore.kernel.org/r/20201031184854.745828-11-jic23@kernel.org