kvm: selftests: aarch64: dirty_log_test: support greater than 40-bit IPAs

When KVM has KVM_CAP_ARM_VM_IPA_SIZE we can test with > 40-bit IPAs by
using the 'type' field of KVM_CREATE_VM.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>