Hexagon (target/hexagon) Fix shadow variable when idef-parser is off

Hexagon (target/hexagon) Fix shadow variable when idef-parser is off

Adding -Werror=shadow=compatible-local causes Hexagon not to build
when idef-parser is off.  The "label" variable in CHECK_NOSHUF_PRED
shadows a variable in the surrounding code.

Signed-off-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Reviewed-by: Brian Cain <bcain@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20231130183955.54314-1-ltaylorsimpson@gmail.com>
Signed-off-by: Brian Cain <bcain@quicinc.com>