ASoC: atmel: atmel-i2s: remove useless initialization

Cppcheck complains:

sound/soc/atmel/atmel-i2s.c:628:6: style: Redundant initialization for 'err'. The initialized value is overwritten before it is read. [redundantInitialization]
 err = devm_request_irq(&pdev->dev, irq, atmel_i2s_interrupt, 0,
     ^
sound/soc/atmel/atmel-i2s.c:598:10: note: err is initialized
 int err = -ENXIO;
         ^
sound/soc/atmel/atmel-i2s.c:628:6: note: err is overwritten
 err = devm_request_irq(&pdev->dev, irq, atmel_i2s_interrupt, 0,
     ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20210326215927.936377-4-pierre-louis.bossart@linux.intel.com


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