iw_cxgb4: 32b platform fixes

- get_dma_mr() was using ~0UL which is should be ~0ULL.  This causes the
DMA MR to get setup incorrectly in hardware.

- wr_log_show() needed a 64b divide function div64_u64() instead of
  doing
division directly.

- fixed warnings about recasting a pointer to a u64

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --cc drivers/infiniband/hw/cxgb4/cm.c
Simple merge

diff --cc drivers/infiniband/hw/cxgb4/cq.c
Simple merge

diff --cc drivers/infiniband/hw/cxgb4/device.c
Simple merge

diff --cc drivers/infiniband/hw/cxgb4/mem.c
Simple merge

diff --cc drivers/infiniband/hw/cxgb4/qp.c
Simple merge