ASoC: bcm: cygnus_ssp: remove useless initialization

Cppcheck warning:

sound/soc/bcm/cygnus-ssp.c:1364:6: style: Redundant initialization for
'err'. The initialized value is overwritten before it is
read. [redundantInitialization]
 err = devm_snd_soc_register_component(dev, &cygnus_ssp_component,
     ^
sound/soc/bcm/cygnus-ssp.c:1313:10: note: err is initialized
 int err = -EINVAL;
         ^
sound/soc/bcm/cygnus-ssp.c:1364:6: note: err is overwritten
 err = devm_snd_soc_register_component(dev, &cygnus_ssp_component,
     ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210326215927.936377-5-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>