ASoC: S3C: Fix PCM TXFIFO_DIPSTICK value

This patch modify FIFO_DIPSTICK value of PCM TX FIFO to be a optimal one.
Privious value (0x20) did not support 'Almost_full' of PCM FIFO for the DMA
request.
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-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/s3c24xx/s3c-pcm.c

@@ -78,7 +78,7 @@ static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on)
 		ctl |= S3C_PCM_CTL_TXDMA_EN;
 		ctl |= S3C_PCM_CTL_TXFIFO_EN;
 		ctl |= S3C_PCM_CTL_ENABLE;
-		ctl |= (0x20<<S3C_PCM_CTL_TXDIPSTICK_SHIFT);
+		ctl |= (0x4<<S3C_PCM_CTL_TXDIPSTICK_SHIFT);
 		clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
 	} else {
 		ctl &= ~S3C_PCM_CTL_TXDMA_EN;