iio:dac:m62332: use ARRAY_SIZE
Make use of ARRAY_SIZE to prevent buffer issues. Signed-off-by: NHartmut Knaack <knaack.h@gmx.de> Acked-by: NDaniel Baluta <daniel.baluta@intel.com> Signed-off-by: NJonathan Cameron <jic23@kernel.org>
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