au6601:.. remove some init regs

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
au6601: rename to hw_init

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
au6601: move hw init

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
au6601: move pre_freq func

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
au6601: use io functions

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
au6601: use commont io funcs

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
au6601:.. dma work

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>