Building with the attached random configuration file,

sound/soc/codecs/alc5623.c:1115:1: warning: data definition has no
type or storage class [enabled by default]
 module_i2c_driver(alc5623_i2c_driver);
 ^
sound/soc/codecs/alc5623.c:1115:1: error: type defaults to ‘int’ in
declaration of ‘module_i2c_driver’ [-Werror=implicit-int]
sound/soc/codecs/alc5623.c:1115:1: warning: parameter names (without
types) in function declaration [enabled by default]
sound/soc/codecs/alc5623.c:1104:26: warning: ‘alc5623_i2c_driver’
defined but not used [-Wunused-variable]
 static struct i2c_driver alc5623_i2c_driver = {
                          ^
cc1: some warnings being treated as errors
make[3]: *** [sound/soc/codecs/alc5623.o] Error 1