iommu: Fix incompatible arg type in iommu_put/get_resv_regions

From: Manoj Iyer
Date: Fri May 05 2017 - 18:39:46 EST

In linux-next struct device dev; was added to struct iommu_device
this breaks calls to iommu_put/get_resv_regions function because
these functions expect struct device * instead.

Please review and consider this patch to fix this.

Manoj Iyer