iommu: make inclusion of arm/arm-smmu-v3 directory conditional

Nothing in there is active if CONFIG_ARM_SMMU_V3 is not enabled, so the whole
directory can depend on that switch as well.

Fixes: e86d1aa ("iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory")
Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/2434059.NG923GbCHz@devpool92.emlix.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: DerDakon

drivers/iommu/arm/Makefile

@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-y += arm-smmu/ arm-smmu-v3/
+obj-y += arm-smmu/
+obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3/

drivers/iommu/arm/arm-smmu-v3/Makefile

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_ARM_SMMU_V3) += arm_smmu_v3.o
+obj-y += arm_smmu_v3.o
 arm_smmu_v3-y := arm-smmu-v3.o
 arm_smmu_v3-$(CONFIG_ARM_SMMU_V3_IOMMUFD) += arm-smmu-v3-iommufd.o
 arm_smmu_v3-$(CONFIG_ARM_SMMU_V3_SVA) += arm-smmu-v3-sva.o