DMA: PL330: Remove duplicate header file inclusion

Removes <linux/interrupt.h> file which was included twice.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>