SYNC TO KERNEL:
- Added vma argument to remap_page_range() for 2.5.3

NEW FEATURES:
- Makefile: added "install" (for 2.4 and 2.5) and "install-2.2" targets

BUG FIXES:
- Removed redundant check for (ov->curframe == -1) from interrupt handler

INTERNAL CHANGES:
- Moved common code from *_move_data() functions to interrupt handler. They
  no longer take an URB as argument or have return value, and they only handle
  a single packet at a time.
- *move_data() functions cleaned up and optimized
- Finished changing "ov511" to "ov"