ASoC: codecs: Remove a useless include

<linux/gcd.h> is not needed for these drivers. Remove the corresponding
#include.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/875ca433849025edf8c23624cf29b0e2250bba50.1668287523.git.christophe.jaillet@wanadoo.frSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/adau1372.c

@@ -8,7 +8,6 @@
 
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gcd.h>
 #include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/module.h>

sound/soc/codecs/adau1373.c

@@ -12,7 +12,6 @@
 #include <linux/pm.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
-#include <linux/gcd.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>

sound/soc/codecs/adau17x1.c

@@ -16,7 +16,6 @@
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>
-#include <linux/gcd.h>
 #include <linux/i2c.h>
 #include <linux/spi/spi.h>
 #include <linux/regmap.h>