ASoC: soc-cache: Remove unneeded codec_drv pointer variable in snd_soc_lzo_get_blksize

Since commit aea170a099793abcd0e6de46b947458073204241
"ASoC: soc-cache: Add reg_size as a member to snd_soc_codec",
the codec_drv pointer variable is not used in snd_soc_lzo_get_blksize.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-cache.c

@@ -548,9 +548,6 @@ static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec,
 
 static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec)
 {
-	const struct snd_soc_codec_driver *codec_drv;
-
-	codec_drv = codec->driver;
 	return DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count());
 }