Sansa AMS PCM : cleanup

Init CGU_AUDIO with correct clock source (for play & rec)
Do not disable recording clocks when starting playback, they are already disabled
Move clock enable/disable code from dma callback to init

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23493 a1c6a512-1295-4272-9138-f99709370657
1 file changed