dmaengine: ioat: Fix spelling mistake "idel" -> "idle"

There is a spelling mistake in the module description. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20221004160913.154739-1-colin.i.king@gmail.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>