davinci-mcasp: use bitfield definitions for PDIR

The current driver creates value for set/clr of PDIR using (x<<26) instead
of the #defines that are convieniently made available.

Update the driver to use the bitfield definitions of PDIR. There is no
functional change introduced by this patch.
Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Reviewed-by: James Nuss <jamesnuss@nanometrics.ca>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/davinci/davinci-mcasp.c

@@ -434,7 +434,8 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 		mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
 		mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
 
-		mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x7 << 26));
+		mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
+				ACLKX | AHCLKX | AFSX);
 		break;
 	case SND_SOC_DAIFMT_CBM_CFS:
 		/* codec is clock master and frame slave */
@@ -444,7 +445,8 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 		mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
 		mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
 
-		mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x2d << 26));
+		mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
+				ACLKX | AFSX | ACLKR | AFSR);
 		break;
 	case SND_SOC_DAIFMT_CBM_CFM:
 		/* codec is clock and frame master */
@@ -454,7 +456,8 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 		mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
 		mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
 
-		mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG, (0x3f << 26));
+		mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
+				ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
 		break;
 
 	default: