iommu/virtio: Fix compile error with viommu_capable()

A recent fix introduced viommu_capable() but other changes
from Robin change the function signature of the call-back it
is used for.

When both changes are merged a compile error will happen
because the function pointer types mismatch. Fix that by
updating the viommu_capable() signature after the merge.

Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
Acked-by: NRobin Murphy <robin.murphy@arm.com>
Reviewed-by: NJean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20220907151154.21911-1-joro@8bytes.org

drivers/iommu/virtio-iommu.c

@@ -1005,7 +1005,7 @@ static int viommu_of_xlate(struct device *dev, struct of_phandle_args *args)
 	return iommu_fwspec_add_ids(dev, args->args, 1);
 }
 
-static bool viommu_capable(enum iommu_cap cap)
+static bool viommu_capable(struct device *dev, enum iommu_cap cap)
 {
 	switch (cap) {
 	case IOMMU_CAP_CACHE_COHERENCY: