ASoC: cs4271: Remove unnecessary additional variable definition

The function already defines a ret variable at the top and makes
no particular use of the shadowed definition, as such remove the
redundant definition.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Paul Handrigan <Paul.Handrigan@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>