ASoC: fsl_sai: fix 1:1 bclk:mclk ratio support

Refactoring in commit a50b7926 ("ASoC: fsl_sai: implement 1:1
bclk:mclk ratio support") led to the bypass never happening
as (ratio = 1) was caught in the existing if (ratio & 1) continue;
check. The correct check sequence instead is:

 - skip all ratios lower than one and higher than 512
 - skip all odd ratios except for 1:1
 - skip 1:1 ratio if and only if !support_1_1_ratio

And for all others, calculate the appropriate divider. Adjust the
code to facilitate this.

Fixes: a50b7926 ("ASoC: fsl_sai: implement 1:1 bclk:mclk ratio support")
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20220405155731.745413-1-a.fatoum@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_sai.c

@@ -372,7 +372,7 @@ static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
 			continue;
 		if (ratio == 1 && !support_1_1_ratio)
 			continue;
-		else if (ratio & 1)
+		if ((ratio & 1) && ratio > 1)
 			continue;
 
 		diff = abs((long)clk_rate - ratio * freq);