dmaengine: iop-adma: Fix pointer cast warnings

dmaengine: iop-adma: Fix pointer cast warnings

drivers/dma/iop-adma.c: In function ‘iop_adma_alloc_chan_resources’:
drivers/dma/iop-adma.c:447:13: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   hw_desc = (char *) iop_chan->device->dma_desc_pool;
             ^
drivers/dma/iop-adma.c:449:4: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    (dma_addr_t) &hw_desc[idx * IOP_ADMA_SLOT_SIZE];
    ^
drivers/dma/iop-adma.c: In function ‘iop_adma_probe’:
drivers/dma/iop-adma.c:1301:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   (void *) adev->dma_desc_pool);

Use dma_addr_t for dma_desc_pool, and %pad to print dma_addr_t.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200818115101.55700-1-yuehaibing@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>