dmaengine: ioatdma: Fix error path in ioat3_dma_probe()

Make sure we are disabling interrupts and destroying DMA pool if
pcie_capability_read/write_word() call failed.

Fixes: 511deae0

 ("dmaengine: ioatdma: disable relaxed ordering for ioatdma")
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240528-ioatdma-fixes-v2-2-a9f2fbe26ab1@yadro.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>