SUMMARY:
This adds experimental OV518 color support. It doesn't work most of the time so
it is disabled by default. The frame rate for OV6630 cameras is much higher now
too, even in greyscale mode. 

PER-FILE CHANGES:
- ov511.c:
  - Add experimental OV518 color support. Doesn't work reliably yet, and must
    use ov518_color parameter to enable it. See ov511.txt for more info.
  - New camera: Ezonics EZCam II
  - Add usb device and bus number (for 2.4) and topology (for 2.5) to /proc
    info file and syslog
  - Minor fix to OV6630 register 0x14 setting
  - Fix missing break statement in mode_init_ov_sensor_regs()
  - Remove a bit of dead code
  - Fix some typos in comments
  - OV6630AE/AF were being incorrectly reported as OV6630 in syslog

- ov511.h:
  - Add stuff for usb_make_path() support (2.5 only)

- ov511.txt:
  - Document the ov518_color parameter
  - Remove the "to-do" and "experimental features" sections (they are terribly
    incomplete and don't really belong there anyway)

- ov6630.c:
  - Increase clock rate, and disable frame drop. This used to cause problems,
    but it works fine now and doubles the frame rate (at minimum).
  - Clean up the register settings a bit