CPUID.07H:EBX.intel-pt not supported warning info shown in terminal when start guest with -cpu qemu64,+intel-pt
Description of problem:
When launch guest with qemu-system-x86_64 with parameter -cpu host,+intel-pt, it will show warning info in terminal :
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25] 'intel_pt' can not be found  in guest's CPU flag. 
While host already support intel_pt.
Steps to reproduce:
1. Run the above QEMU command.
Additional information:
This issue was observed with kernel 5.13

qemu-system-x86_64 -accel kvm -m 4096 -smp 4 -cpu host,+intel-pt,min-level=0x14
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]