make W=1 warning:

sound/soc/fsl/fsl_ssi.c:371: warning: expecting prototype for
fsl_ssi_irq(). Prototype was for fsl_ssi_isr() instead
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210302205926.49063-7-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>