iommu: Remove trivial ops->capable implementations

Implementing ops->capable to always return false is pointless since it's
the default behaviour anyway. Clean up the unnecessary implementations.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/8413578c6f8a7cf75530b00cba8f10f5b88f8517.1644495614.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/msm_iommu.c

@@ -558,11 +558,6 @@ fail:
 	return ret;
 }
 
-static bool msm_iommu_capable(enum iommu_cap cap)
-{
-	return false;
-}
-
 static void print_ctx_regs(void __iomem *base, int ctx)
 {
 	unsigned int fsr = GET_FSR(base, ctx);
@@ -672,7 +667,6 @@ fail:
 }
 
 static struct iommu_ops msm_iommu_ops = {
-	.capable = msm_iommu_capable,
 	.domain_alloc = msm_iommu_domain_alloc,
 	.domain_free = msm_iommu_domain_free,
 	.attach_dev = msm_iommu_attach_dev,

drivers/iommu/tegra-gart.c

@@ -238,11 +238,6 @@ static phys_addr_t gart_iommu_iova_to_phys(struct iommu_domain *domain,
 	return pte & GART_PAGE_MASK;
 }
 
-static bool gart_iommu_capable(enum iommu_cap cap)
-{
-	return false;
-}
-
 static struct iommu_device *gart_iommu_probe_device(struct device *dev)
 {
 	if (!dev_iommu_fwspec_get(dev))
@@ -276,7 +271,6 @@ static void gart_iommu_sync(struct iommu_domain *domain,
 }
 
 static const struct iommu_ops gart_iommu_ops = {
-	.capable	= gart_iommu_capable,
 	.domain_alloc	= gart_iommu_domain_alloc,
 	.domain_free	= gart_iommu_domain_free,
 	.attach_dev	= gart_iommu_attach_dev,

drivers/iommu/tegra-smmu.c

@@ -272,11 +272,6 @@ static void tegra_smmu_free_asid(struct tegra_smmu *smmu, unsigned int id)
 	clear_bit(id, smmu->asids);
 }
 
-static bool tegra_smmu_capable(enum iommu_cap cap)
-{
-	return false;
-}
-
 static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type)
 {
 	struct tegra_smmu_as *as;
@@ -967,7 +962,6 @@ static int tegra_smmu_of_xlate(struct device *dev,
 }
 
 static const struct iommu_ops tegra_smmu_ops = {
-	.capable = tegra_smmu_capable,
 	.domain_alloc = tegra_smmu_domain_alloc,
 	.domain_free = tegra_smmu_domain_free,
 	.attach_dev = tegra_smmu_attach_dev,