staging: wilc1000: rename goto to avoid leading '_' in label name

Cleanup patch to avoid use of leading '_' in goto label name. Also used
proper string for lable names.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>