Skip wq irq resources freeing when wq type is not kernel since the driver
skips the irq alloction during wq enable. Add check in wq type check in
idxd_wq_free_irq() to mirror idxd_wq_request_irq().

Fixes: 63c14ae6 ("dmaengine: idxd: refactor wq driver enable/disable operations")
Reported-by: Tony Zu <tony.zhu@intel.com>
Tested-by: Tony Zu <tony.zhu@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/165176310726.2112428.7474366910758522079.stgit@djiang5-desk3.ch.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>