listpcrs: remove one redundant call to tpm get cap
listpcrs: remove one redundant call to tpm get cap

Signed-of-by: Gang Wei <6d5a647491850fa33af0ccb95e6ed20e2ffd2d4e@intel.com>

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