dmaengine: ioatdma: Fix leaking on version mismatch

Fix leaking ioatdma_device if I/OAT version is less than IOAT_VER_3_0.

Fixes: bf453a0a

 ("dmaengine: ioat: Support in-use unbind")
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-v2-1-a9f2fbe26ab1@yadro.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>