target/nios2: Mark raise_exception() as noreturn

Raised exceptions don't return, so mark the helper with noreturn.

Fixes: 032c76bc6f9 ("nios2: Add architecture emulation support")
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210729101315.2318714-1-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
1 file changed