tpm2_nvwrite: only print data on verbose
tpm2_nvwrite: only print data on verbose

Only print the written data when -V is specified and print
the data in an xxd compatable hexdump.

Fixes: #605

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

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