ARM: OMAP: Remove errors and warnings and make omap-aic23.c compile again:

sound/arm/omap-aic23.c:661: error: structure has no member named
`pm_private_data'
sound/arm/omap-aic23.c:680: error: structure has no member named
`pm_private_data'
sound/arm/omap-aic23.c:772: warning: implicit declaration of function
`clk_get_usecount'
sound/arm/omap-aic23.c:863: warning: implicit declaration of function
`snd_card_set_pm_callback'

Note: Needs "Fix clk_get_usecount() warning" patch

Signed-off-by: Dirk Behme <dirk.behme_at_de.bosch.com>