x86/speculation: Fix bad argument to rdmsrl() in cpu_set_bug_bits()

x86/speculation: Fix bad argument to rdmsrl() in cpu_set_bug_bits()

At the beginning of cpu_set_bug_bits(), rdmsrl() is incorrectly
passed as its first argument the value of 86_FEATURE_IA32_ARCH_CAPS,
which is a CPUID feature bit and not a valid MSR value. The correct
parameter to pass in the first argument to rdmsrl() is
MSR_IA32_ARCH_CAPABILITIES (0x10a).

The value returned by rdmsrl(), specifically the RDCL_NO bit, is
later used to determine if the CPU is vulnerable to L1TF and
Meltdown exploits.

Orabug: 29044805

Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>