ASoC: pxa: address unused variable warning

gcc with W=1 reports
sound/soc/pxa/pxa-ssp.c:594:15: warning: variable 'acds' set but not used [-Wunused-but-set-variable]
                                            ^
This variable is not used so remove it.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308040619.BEismjFv-lkp@intel.com/Signed-off-by: Yu Liao <liaoyu15@huawei.com>
Link: https://lore.kernel.org/r/20230808132519.637452-1-liaoyu15@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/pxa/pxa-ssp.c

@@ -591,7 +591,7 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
 
 		if (ret < 0) {
 			const struct pxa_ssp_clock_mode *m;
-			int ssacd, acds;
+			int ssacd;
 
 			for (m = pxa_ssp_clock_modes; m->rate; m++) {
 				if (m->rate == rate)
@@ -601,12 +601,6 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
 			if (!m->rate)
 				return -EINVAL;
 
-			acds = m->acds;
-
-			/* The values in the table are for 16 bits */
-			if (width == 32)
-				acds--;
-
 			ret = pxa_ssp_set_pll(priv, bclk);
 			if (ret < 0)
 				return ret;