dmaengine: Convert timers to use timer_setup()

As per commit 7eeb6b89 ("timer: Remove init_timer() interface")
made changes to convert to use timer_setup().

Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
Signed-off-by: Srikanth Krishnakar <Srikanth_Krishnakar@mentor.com>