OpenPGP: cleanup pgp_build_tlv()
OpenPGP: cleanup pgp_build_tlv()

- get rid of intermediate variable
- clarify check in while() loop
- line breaks for easier reading

LudovicRousseau/OpenSC,LudovicRousseau/OpenSC,hongquan/OpenSC-main,OpenSC/OpenSC,dengert/OpenSC,mouse07410/OpenSC,viktorTarasov/OpenSC-SM,mtrojnar/OpenSC,aobaid/OpenSC,rickyepoderi/OpenSC,mouse07410/OpenSC,hhonkanen/OpenSC,kasparsd/opensc-latvia-id,l1k/OpenSC,aobaid/OpenSC,frankmorgner/OpenSC,fabled/OpenSC,rickyepoderi/OpenSC,nmav/OpenSC,aobaid/OpenSC,mtrojnar/OpenSC,frankmorgner/OpenSC,mouse07410/OpenSC,l1k/OpenSC,AktivCo/OpenSC,hongquan/OpenSC-main,CardContact/OpenSC,metsma/OpenSC,Jakuje/OpenSC,fabled/OpenSC,martinpaljak/OpenSC,hhonkanen/OpenSC,metsma/OpenSC,OpenSC/OpenSC,germanblanco/OpenSC,jpki/OpenSC,germanblanco/OpenSC,AktivCo/OpenSC,gemini/OpenSC,LudovicRousseau/OpenSC,kasparsd/opensc-latvia-id,viktorTarasov/OpenSC-SM,kasparsd/opensc-latvia-id,fabled/OpenSC,martinpaljak/OpenSC,l1k/OpenSC,metsma/OpenSC,nmav/OpenSC,dengert/OpenSC,philipWendland/OpenSC,aobaid/OpenSC,mtrojnar/OpenSC,gemini/OpenSC,Jakuje/OpenSC,Jakuje/OpenSC,fabled/OpenSC,martinpaljak/OpenSC,gemini/OpenSC,philipWendland/OpenSC,kasparsd/opensc-latvia-id,nmav/OpenSC,frankmorgner/OpenSC,philipWendland/OpenSC,OpenSC/OpenSC,AktivCo/OpenSC,Jakuje/OpenSC,viktorTarasov/OpenSC-SM,hhonkanen/OpenSC,rickyepoderi/OpenSC,jpki/OpenSC,frankmorgner/OpenSC,jpki/OpenSC,CardContact/OpenSC,hongquan/OpenSC-main,germanblanco/OpenSC,dengert/OpenSC,CardContact/OpenSC