we will use the 26bit relative relocs in the aarch64 tcg target.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 51A5C52A.4080001@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>