ASoC: Samsung: Set default rclk source rate

Since the rclk_srcrate is cleared upon startup, it should be
initialized upon second and later 'open' calls to the device
with same root-clock source. The bug is otherwise visible in
Codec-Slave mode.
Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/samsung/i2s.c

@@ -525,6 +525,8 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
 					clk_disable(i2s->op_clk);
 					clk_put(i2s->op_clk);
 				} else {
+					i2s->rclk_srcrate =
+						clk_get_rate(i2s->op_clk);
 					return 0;
 				}
 			}