parse: nmea_parse_GPGGA: use sscanf instead of nmea_scanf
parse: nmea_parse_GPGGA: use sscanf instead of nmea_scanf

Signed-off-by: Ferry Huberts <66e11f9f5d965b69497c7e73d5e808f8b13c1218@pelagic.nl>

AHR-Project/nmealib,AHR-Project/nmealib