ASoC: Intel: Fix check for pdata usage before dereference.

ASoC: Intel: Fix check for pdata usage before dereference.

This patch fixes the following dereference check ordering.

 sound/soc/intel/sst-haswell-pcm.c:749 hsw_pcm_probe() warn: variable dereferenced before check 'pdata' (see line 746)

 git remote add asoc git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
 git remote update asoc
 git checkout 7ea94fb4d117a3c481a9d92229bcdee21fc32696
 vim +/pdata +749 sound/soc/intel/sst-haswell-pcm.c

 b91c8f2c Mark Brown    2014-03-12  740  };
 b91c8f2c Mark Brown    2014-03-12  741
 b91c8f2c Mark Brown    2014-03-12  742  static int hsw_pcm_probe(struct snd_soc_platform *platform)
 b91c8f2c Mark Brown    2014-03-12  743  {
 b91c8f2c Mark Brown    2014-03-12  744  	struct sst_pdata *pdata = dev_get_platdata(platform->dev);
 b91c8f2c Mark Brown    2014-03-12  745  	struct hsw_priv_data *priv_data;
 7ea94fb4 Liam Girdwood 2014-05-02 @746  	struct device *dma_dev = pdata->dma_dev;
 7ea94fb4 Liam Girdwood 2014-05-02  747  	int i, ret = 0;
 b91c8f2c Mark Brown    2014-03-12  748
 b91c8f2c Mark Brown    2014-03-12 @749  	if (!pdata)
 b91c8f2c Mark Brown    2014-03-12  750  		return -ENODEV;
 b91c8f2c Mark Brown    2014-03-12  751
 b91c8f2c Mark Brown    2014-03-12  752  	priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data), GFP_KERNEL);

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>