dmaengine: idxd: clear misc interrupt cause after read

Move the clearing of misc interrupt cause to immediately after reading the
register in order to allow the next interrupt to be asserted.

Suggested-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/159603824665.28647.5344356370364397996.stgit@djiang5-desk3.ch.intel.com


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