ALSA: Fix register programming in Freescale MPC8610 HPCD sound driver

Fix the Freescale MPC8610 HPCD sound driver so that it programs the DMACR
and PMUXCR registers in the global utilities correctly.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>