ste_dma40: move channel mode to a separate field

And keep it logical by default.

Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --cc arch/arm/mach-ux500/devices-db8500.c
Simple merge

diff --cc arch/arm/plat-nomadik/include/plat/ste_dma40.h
Simple merge

diff --cc drivers/dma/ste_dma40.c
Simple merge