tpm2_getcap: fix 0x08 in output 
tpm2_getcap: fix 0x08 in output 

Fix the 0x08 in the output for TPM2_PT_FAMILY_INDICATOR. It should just be 0x<hex>

Fixes: #1655
01org/tpm2.0-tools,01org/tpm2.0-tools,01org/tpm2.0-tools