ASoC: rcar: ssi: don't set SSICR.CKDV = 000 with SSIWSR.CONT

R-Car Datasheet is indicating "SSICR.CKDV = 000 is invalid when
SSIWSR.WS_MODE = 1 or SSIWSR.CONT = 1".
Current driver will set CONT, thus, we shouldn't use CKDV = 000.
This patch fixup it.
Reported-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/ssi.c

@@ -227,6 +227,15 @@ static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
 	 */
 	for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
 
+		/*
+		 * It will set SSIWSR.CONT here, but SSICR.CKDV = 000
+		 * with it is not allowed. (SSIWSR.WS_MODE with
+		 * SSICR.CKDV = 000 is not allowed either).
+		 * Skip it. See SSICR.CKDV
+		 */
+		if (j == 0)
+			continue;
+
 		/*
 		 * this driver is assuming that
 		 * system word is 32bit x chan