This fixes some bugs observed in the EHCI code:

  - Byte-order confusion caused the wrong address to be set
    on big-endian hardware (reported last week on PPC and
    SPARC).   That bug's been there for about a year, with
    no problem reports ... hmm.

  - Used the wrong bitmask to determine max packet size
    for interrupt transfers, so they were limited to 1023
    bytes (not 1024 bytes) at high speed.

  - Because those two problems related to the masking,
    I sanity checked it and moved more of byteswapping
    to compile time.

  - Removes some oopsing in the (debug) periodic schedule
    dump, seen with patches that add more interesting
    behaviors (which folk are finally trying...).

  - Removed some now-pointless <linux/version.h> usage