At least on PPC, the "op ? op : dma" construct causes a compile failure
because the dma_* is a do{}while(0) macro.

This turns all of them into proper if/else to avoid this problem.
Signed-off-by: NBen Collins <bcollins@ubuntu.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>