tpm2_pcrevent.c: Fix errorneous return types and overwritting of tool_rc_from_tpm
tpm2_pcrevent.c: Fix errorneous return types and overwritting of tool_rc_from_tpm

Signed-off-by: Imran Desai <4c1ed57e03ffb00ef59b57a9e5270749c817bcef@gmail.com>

01org/tpm2.0-tools,01org/tpm2.0-tools,01org/tpm2.0-tools