hw/xtensa: sim: use g_string/g_new Replace malloc/free/sprintf with g_string/g_string_printf/g_string_free. Replace g_malloc with g_new when allocating the MemoryRegion to get more type safety. Suggested-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>