Commit 3d8cc000 ("dmaengine: ipu: Consolidate duplicated irq handlers")
consolidated the two interrupts routines into one, but the remaining
interrupt routine only checks the status of the error interrupts, not the
normal interrupts.

This patch fixes that problem (tested on i.MX31 PDK board).

Fixes: 3d8cc000 ("dmaengine: ipu: Consolidate duplicated irq handlers")
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: <stable@vger.kernel.org> # 4.1.x
Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>