[Bug dynamic-link/27201] Consider disabling x86-64-v2 support check

["hjl.tools at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=27201

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
I tested KVM on Fedora 33/Westmere.  /proc/cpuinfo looks OK:

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 44
model name      : Westmere E56xx/L56xx/X56xx (IBRS update)
stepping        : 1
microcode       : 0x1
cpu MHz         : 3333.292
cache size      : 16384 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat pse36 clflush mmx fxsr sse sse2 syscall nx pdpe1gb rdtscp lm constant_tsc
re
p_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 cx16 pcid
sse
4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes hypervisor lahf_lm cpuid_fault
p
ti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid tsc_adjust arat
um
ip arch_capabilities

tst-isa-level-1.c works fine:

Breakpoint 1, do_test () at ../sysdeps/x86/tst-isa-level-1.c:63
63        const struct cpu_features *cpu_features
(gdb) next
65        unsigned int isa_level = get_isa_level (cpu_features);
(gdb) 
81        do_test_1 ("tst-isa-level-mod-1-baseline.so", false);
(gdb) 
87        do_test_1 ("tst-isa-level-mod-1-v4.so", true);
(gdb) 
93        do_test_1 ("tst-isa-level-mod-1-v3.so", true);
(gdb) 
96        if (has_isa_v2)
(gdb) 
78            return EXIT_SUCCESS;
(gdb)

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