my/print_string: take void * parameter rather than uint8_t *
my/print_string: take void * parameter rather than uint8_t *

hstern/wdns,hstern/wdns,snarkmaster/mtbl,rep/mtbl,snarkmaster/mtbl,farsightsec/fstrm,farsightsec/fstrm,hstern/nmsg,hstern/nmsg,hstern/wdns,rep/mtbl,hstern/nmsg,farsightsec/mtbl,hstern/nmsg,rep/mtbl,hstern/nmsg,hstern/wdns,snarkmaster/mtbl,farsightsec/mtbl