ASoC: uniphier: remove redundant check of blk_id

The check of blk_id == AUD_CLK_IO is redundant as it also being performed
in the following switch statement with the same return of -ENOTSUPP. Fix
this by removing the redundant comparison.

Detected by CoverityScan, CID#1465227 ("Logically dead code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/uniphier/aio-cpu.c

@@ -134,9 +134,6 @@ static int uniphier_aio_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 	bool pll_auto = false;
 	int pll_id, div_id;
 
-	if (clk_id == AUD_CLK_IO)
-		return -ENOTSUPP;
-
 	switch (clk_id) {
 	case AUD_CLK_IO:
 		return -ENOTSUPP;