ARM: S3C64XX: DMA: Debugged alloc's with GFP_KERNEL flag in Intr context.

s3c2410_dma_enqueue makes call to kzalloc and dma_pool_alloc with GFP_KERNEL
flag set, this can be an issue for drivers, like I2S, which call
s3c2410_dma_enqueue from dma-bufferdone callback.

Change the flag GFP_KERNEL to GFP_ATOMIC to avoid any problems.

Signed-Off-by: Jassi <jassi.brar@samsung.com>
[ben-linux@fluff.org: Minor description edit and re-wrap]

Signed-off-by: Ben Dooks <ben-linux@fluff.org>