KVM: Add missing arch for KVM_CREATE_DEVICE and KVM_{SET,GET}_DEVICE_ATTR

The ioctls are missing an architecture property that is present in others.
Suggested-by: Sergio Lopez Pascual <slp@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Message-Id: <20221202105011.185147-5-javierm@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Documentation/virt/kvm/api.rst

@@ -3266,6 +3266,7 @@ valid entries found.
 ----------------------
 
 :Capability: KVM_CAP_DEVICE_CTRL
+:Architectures: all
 :Type: vm ioctl
 :Parameters: struct kvm_create_device (in/out)
 :Returns: 0 on success, -1 on error
@@ -3306,6 +3307,7 @@ number.
 :Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device,
              KVM_CAP_VCPU_ATTRIBUTES for vcpu device
              KVM_CAP_SYS_ATTRIBUTES for system (/dev/kvm) device (no set)
+:Architectures: x86, arm64, s390
 :Type: device ioctl, vm ioctl, vcpu ioctl
 :Parameters: struct kvm_device_attr
 :Returns: 0 on success, -1 on error