From bb60646c8befe218d0bd49e71e62252cd6408ae5 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 30 Apr 2015 15:15:48 +0200
Subject: [PATCH] iio: st_sensors: make BDU optional

Not all sensors support BDU (block data update) and in fact a
bunch of the in-kernel sensor settings do not specify the
BDU address field. Make this optional.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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