[ewg] [PATCH] backport patches for ib_ipath for 2.6.26

[Ralph Campbell]

These two commits allow ib_ipath to compile again.
Vlad, please pull from:

git://git.openfabrics.org/~ralphc/ofed-1.4-linux-2.6/.git ofed_kernel

commit 76185d73a6cc500e7199e3a153d67fac8f9818dc
Author: Ralph Campbell (QLogic) <ralphc at hosting.openfabrics.org>
Date:   Wed Aug 6 13:48:15 2008 -0700

    BACKPORT - ipath dma_map_error() change
    
    This patch undoes the changes made by commit ID
    8d8bb39b9eba32dd70e87fd5ad5c5dd4ba118e06
    
    Signed-off-by: Ralph Campbell <ralph.campbell at qlogic.com>

commit 1eecfce46ff31717c8803d6fd59ca54137e1d13a
Author: Ralph Campbell (QLogic) <ralphc at hosting.openfabrics.org>
Date:   Wed Aug 6 13:43:35 2008 -0700

    BACKPORT - add new file rculist.h
    
    This was added in 2.6.27
    
    Signed-off-by: Ralph Campbell <ralph.campbell at qlogic.com>