ASoC: Intel: Skylake: skl-topology: remove redundant assignment

Fix cppcheck warning:

sound/soc/intel/skylake/skl-topology.c:2879:29: style: Variable
'block_size' is assigned a value that is never used. [unreadVariable]
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200813200147.61990-21-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-topology.c

@@ -2876,7 +2876,7 @@ static int skl_tplg_get_pvt_data(struct snd_soc_tplg_dapm_widget *tplg_w,
 				struct skl_module_cfg *mconfig)
 {
 	struct snd_soc_tplg_vendor_array *array;
-	int num_blocks, block_size = 0, block_type, off = 0;
+	int num_blocks, block_size, block_type, off = 0;
 	char *data;
 	int ret;