iio: ad5624r_spi: Remove redundant variable
By re-arranging the code, 'ret' can be removed from this function. Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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