target/riscv: Convert misa_mxl_max using GLib macros

Use GLib conversion macros to pass misa_mxl_max as
riscv_cpu_class_init() class data.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250210133134.90879-6-philmd@linaro.org>
1 file changed