ASoC: mediatek: add I2C dependency for CS42XX8

ASoC: mediatek: add I2C dependency for CS42XX8

We should not select drivers that depend on I2C when that is disabled,
as it results in a build error:

warning: (SND_SOC_MT2701_WM8960) selects SND_SOC_WM8960 which has unmet direct dependencies (SOUND && !M68K && !UML && SND && SND_SOC && I2C)
sound/soc/codecs/wm8960.c:1469:1: error: data definition has no type or storage class [-Werror]
sound/soc/codecs/wm8960.c:1469:1: error: type defaults to 'int' in declaration of 'module_i2c_driver' [-Werror=implicit-int]

Fixes: 8625c1dbd876 ("ASoC: mediatek: Add mt2701-wm8960 machine driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>