sound: codecs: Fix compile problem

This patch fixes the compile error as below.

sound/soc/codecs/max98090.c: In function ‘max98090_set_bias_level’:
sound/soc/codecs/max98090.c:1280:22: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘max98090_i2c_remove’
sound/soc/codecs/max98090.c:1305:2: error: implicit declaration of function ‘__devexit_p’ [-Werror=implicit-function-declaration]
sound/soc/codecs/max98090.c:1305:24: error: ‘max98090_i2c_remove’ undeclared here (not in a function)
cc1: some warnings being treated as errors

Signed-off-by: Dongjin Kim <tobetter@gmail.com>