KVM: Expose new cpu features to guest

KVM: Expose new cpu features to guest

BugLink: http://bugs.launchpad.net/bugs/1739665
Intel IceLake cpu has added new cpu features,AVX512_VBMI2/GFNI/
VAES/VPCLMULQDQ/AVX512_VNNI/AVX512_BITALG. Those new cpu features
need expose to guest VM.

The bit definition:
CPUID.(EAX=7,ECX=0):ECX[bit 06] AVX512_VBMI2
CPUID.(EAX=7,ECX=0):ECX[bit 08] GFNI
CPUID.(EAX=7,ECX=0):ECX[bit 09] VAES
CPUID.(EAX=7,ECX=0):ECX[bit 10] VPCLMULQDQ
CPUID.(EAX=7,ECX=0):ECX[bit 11] AVX512_VNNI
CPUID.(EAX=7,ECX=0):ECX[bit 12] AVX512_BITALG

The release document ref below link:
https://software.intel.com/sites/default/files/managed/c5/15/\
architecture-instruction-set-extensions-programming-reference.pdf

The kernel dependency commit in kvm.git:
(c128dbfa0f879f8ce7b79054037889b0b2240728)

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
(cherry picked from commit 80fef315a74d79d765dbf58d9481843a364c50d6)
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>