dmaengine: Fix a bug about BUG_ON() on DMA engine capability DMA_INTERRUPT.
dmaengine: Fix a bug about BUG_ON() on DMA engine capability DMA_INTERRUPT.

The device->device_prep_dma_interrupt function is used by
DMA_INTERRUPT capability, not DMA_ZERO_SUM.

Signed-off-by: Zhang Wei <fe132b35e7c83913143b70239c4ec3c76b49c183@freescale.com>
Acked-by: Maciej Sosnowski <a6d933f4cf474de3a01bcf87cdc350f7c76eff48@intel.com>
Signed-off-by: Dan Williams <24ee2bf0bd8ac766c348bf1f0639943bac1535c6@intel.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs