changed AD1974 LRCLK format from 50/50 to PULSE
changed AUDIO_FORMAT from inverted frameclock to normal frameclock
4 CHANNEL version. RFIFO error in mcasp_start(..) fixed, loads of printk in davinci-pcm
8 channel version with corrected RFIFO error in mcasp_start(..), removed printk in davinci-pcm.c