linux-oz-2.6: 2.6.15 updates:

linux-oz-2.6: 2.6.15 updates:
 * LEDs updates based on comments from LKML and other sources:
   * Functions now all follow the name led_*
   * brightness is now an enum
   * the timer frequency is in Hz
   * the time has a duty parameter
   * include the ixp4xx driver in the LED patch series (thanks jbowler)
 * Rework backlight class to handle a number of bugs to do with suspend/resume
   making state assumptions
 * Move common backlight code/variables are moved out of the driver into the core.
 * Update corgi_generic_bl patch so tosa can share the code
 * Add arm IP checksum fix (some users reported seeing checksum corruption)
 * Add potential fix for pxafb issues (whitescreen)
 * Fix pxa27x cpu speed reporting
 * Increase the scanrate on c series keyboards (solved key repeat issue)