target/xtensa: Replace DISAS_UPDATE with DISAS_NORETURN

The usage of DISAS_UPDATE is after noreturn helpers.
It is thus indistinguishable from DISAS_NORETURN.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
1 file changed