target/i386: Add missing feature bits in EPYC-Milan model

target/i386: Add missing feature bits in EPYC-Milan model

Add the following feature bits for EPYC-Milan model and bump the version.
vaes            : Vector VAES(ENC|DEC), VAES(ENC|DEC)LAST instruction support
vpclmulqdq	: Vector VPCLMULQDQ instruction support
stibp-always-on : Single Thread Indirect Branch Prediction Mode has enhanced
                  performance and may be left Always on
amd-psfd	: Predictive Store Forward Disable
no-nested-data-bp         : Processor ignores nested data breakpoints
lfence-always-serializing : LFENCE instruction is always serializing
null-sel-clr-base         : Null Selector Clears Base. When this bit is
                            set, a null segment load clears the segment base

These new features will be added in EPYC-Milan-v2. The "-cpu help" output
after the change will be.

    x86 EPYC-Milan             (alias configured by machine type)
    x86 EPYC-Milan-v1          AMD EPYC-Milan Processor
    x86 EPYC-Milan-v2          AMD EPYC-Milan Processor

The documentation for the features are available in the links below.
a. Processor Programming Reference (PPR) for AMD Family 19h Model 01h,
   Revision B1 Processors
b. SECURITY ANALYSIS OF AMD PREDICTIVE STORE FORWARDING
c. AMD64 Architecture Programmer’s Manual Volumes 1–5 Publication No. Revision
    40332 4.05 Date October 2022

Signed-off-by: Babu Moger <babu.moger@amd.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip
Link: https://www.amd.com/system/files/documents/security-analysis-predictive-store-forwarding.pdf
Link: https://www.amd.com/system/files/TechDocs/40332_4.05.pdf
Message-Id: <20230504205313.225073-6-babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>