git: DragonFly_RELEASE_4_2 kernel - Sync ehci controller with FreeBSD

[Matthew Dillon]

commit 6615e0b1b20ad69c4f38d42fc1cecef183a7c95d
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Thu Jun 18 19:34:32 2015 -0700

    kernel - Sync ehci controller with FreeBSD
    
    * Sync ehci controller w/FreeBSD to FreeBSD 8c1b21d9ef,
      ehci.c and ehci.h only.
    
    * Contains better fix for doorbell issue from FreeBSD devs.
    
    * Fixes numerous ehci port issues that the older hack had not fixed.
    
    Testing-by: tm512, dillon

Summary of changes:
 sys/bus/u4b/controller/ehci.c | 364 ++++++++++++++++--------------------------
 sys/bus/u4b/controller/ehci.h |   4 +-
 2 files changed, 142 insertions(+), 226 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/6615e0b1b20ad69c4f38d42fc1cecef183a7c95d


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