ASoC: Intel: sof_ssp_amp: remove 'set-but-not-used' warning

ASoC: Intel: sof_ssp_amp: remove 'set-but-not-used' warning

Clang warning:
>> sound/soc/intel/boards/sof_ssp_amp.c:97:6: warning: variable 'i'
   set but not used [-Wunused-but-set-variable]
           int i = 0;
               ^

The device counter is not used when the quirk is not set, which static
analysis cannot know. Move its initialization before the loop to
remove this warning.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220421163645.319686-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>