ACI and PCM20-radio kernel patch

• 2.4.0-test8
  Changes:
  • aci.c
    
    • general clean-up and rewrite of aci.c for 2.4.x
    • added SMP safe locking
    • ioctl pointer bugfix
    • added (OSS-limited) equalizer support
    • better distinction of PCM1/PCM12/PCM20 for good mixer-labeling/mic-preamp/output-amplification handling
    • threw mad16 dependence away: no mixer-number hack anymore
    • 'solo' mode doesn't need some private ioctl() anymore
  • radio-miropcm20.c
    • removed unclear volume handling (maybe I add it later again)
    • added stereo/corrected mute handling
    • tune-ioctl() pays attention to different aci-versions
    • change to TUNER_LOW for 50kHz steps
    • integrated lowlevel RDS routines, currently only for finegrained signal strength value
  • other changes
    • documentation updates/corrections
• 2.4.0
• 2.4.1-1
  
  • corrected symbol export; aci compiled in and miropcm20 as module is working now
• 2.4.1-2
  
  • added compile time check for conflicting configurations (thanks to Arjan van de Ven)
• 2.4.1-3
  
  • minor tweaks
• 2.4.1-4
  
  • it's like the 2.4.1-3 patch, but uses another solution to avoid conflicting configurations (from Jocelyn Mayer)
    (configuration time check - best used with 'make xconfig')
• 2.4.2
  
  • cpu friendly during wait loop
• 2.4.2-ac12: Alan included my patch in his well known kernel tree.
• 2.4.4-pre5: contains my patch as well.
• 2.4.4-pre5 (will probably also work for 2.4.4)
  
  • some renaming issues
  • gave miropcm20-rds-core.c it's own header file
  • invented some makros for better readability
  • created RDS user interface driver; "cat /dev/v4l/rds/radio0/rt" to get radiotext...
• 2.4.5
  
  • adapted video_register_device()-call (changed in kernel)
• 2.4.6-pre3: contains my latest patch