Tpm2Ptp.c is library, but it miss Tpm2 prefix for IsPtpPresence() and GetPtpInterface(). There might be risk as name symbol conflict. This patch adds Tpm2 prefix for them. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Yao, Jiewen" <Jiewen.Yao@intel.com> Reviewed-by: "Zhang, Chao B" <chao.b.zhang@intel.com> Tested-by: "Wu, Hao A" <hao.a.wu@intel.com>