IB/core: Use the new verbs DMA mapping functions

Convert code in core/ to use the new DMA mapping functions for kernel
verbs consumers.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --cc drivers/infiniband/core/mad.c
Simple merge

diff --cc drivers/infiniband/core/mad_priv.h
Simple merge

diff --cc drivers/infiniband/core/uverbs_mem.c
Simple merge