fully convert arm to use dma-direct v2

[Christoph Hellwig]

Hi all,

arm is the last platform not using the dma-direct code for directly
mapped DMA.  With the dmaboune removal from Arnd we can easily switch
arm to always use dma-direct now (it already does for LPAE configs
and nommu).  I'd love to merge this series through the dma-mapping tree
as it gives us the opportunity for additional core dma-mapping
improvements.

Changes since v1:
 - remove another unused function
 - improve a few commit logs
 - add three more patches from Robin

Diffstat:
 arch/arm/common/dmabounce.c                          |  582 -----------------
 arch/arm/include/asm/dma-mapping.h                   |  128 ---
 b/arch/arm/Kconfig                                   |    5 
 b/arch/arm/common/Kconfig                            |    6 
 b/arch/arm/common/Makefile                           |    1 
 b/arch/arm/common/sa1111.c                           |   64 -
 b/arch/arm/include/asm/device.h                      |    3 
 b/arch/arm/include/asm/dma-direct.h                  |   49 -
 b/arch/arm/include/asm/memory.h                      |    2 
 b/arch/arm/mach-footbridge/Kconfig                   |    1 
 b/arch/arm/mach-footbridge/common.c                  |   19 
 b/arch/arm/mach-footbridge/include/mach/dma-direct.h |    8 
 b/arch/arm/mach-footbridge/include/mach/memory.h     |    4 
 b/arch/arm/mach-highbank/highbank.c                  |    2 
 b/arch/arm/mach-mvebu/coherency.c                    |    2 
 b/arch/arm/mm/dma-mapping.c                          |  649 ++-----------------
 b/drivers/usb/core/hcd.c                             |   17 
 b/drivers/usb/host/ohci-sa1111.c                     |   25 
 18 files changed, 137 insertions(+), 1430 deletions(-)