wm8994: voodoo sound support from project_voodoo

commit originally by gokhanmoral
https://github.com/Ayysir/siyahkernel-sgs3/commit/b601db4fdab493efa206c1ae6c1b263132d1e25d
	modified:   sound/soc/Kconfig
	new file:   sound/soc/codecs/Kconfig.voodoo
	modified:   sound/soc/codecs/wm8994.c
	new file:   sound/soc/codecs/wm8994_voodoo.c
	new file:   sound/soc/codecs/wm8994_voodoo.h