tpm2_nvdefine: remove un-needed flag
tpm2_nvdefine: remove un-needed flag

There was no need for a seperate flag when a NULL
check could be performed on policy_file.

Signed-off-by: William Roberts <60148e894dabf0b83bde1d460768794cd453c455@intel.com>

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