ASoC: pxa-ssp: simplify pxa_ssp_set_dai_sysclk()

There's no need to read the register again prior to writing it, we did
that in the beginning of the function.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/pxa/pxa-ssp.c

@@ -217,7 +217,6 @@ static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 {
 	struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
 	struct ssp_device *ssp = priv->ssp;
-	int val;
 
 	u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
 		~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
@@ -258,8 +257,7 @@ static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 	 * on PXA2xx.  On PXA3xx it must be enabled when doing so. */
 	if (ssp->type != PXA3xx_SSP)
 		clk_disable_unprepare(ssp->clk);
-	val = pxa_ssp_read_reg(ssp, SSCR0) | sscr0;
-	pxa_ssp_write_reg(ssp, SSCR0, val);
+	pxa_ssp_write_reg(ssp, SSCR0, sscr0);
 	if (ssp->type != PXA3xx_SSP)
 		clk_prepare_enable(ssp->clk);