bmp085.yaml: transform DT documentation of iio sensor into YAML

use bmp085.txt and change it into yaml format

fix links to datasheets in replaced documentation

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>