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.fr


Signed-off-by: Mark Brown <broonie@kernel.org>