x86/cpufeatures: Remove get_scattered_cpuid_leaf()

get_scattered_cpuid_leaf() was added[1] to help KVM rebuild hardware-
defined leafs that are rearranged by Linux to avoid bloating the
x86_capability array. Eventually, the last consumer of the function was
removed[2], but the function itself was kept, perhaps even intentionally
as a form of documentation.

Remove get_scattered_cpuid_leaf() as it is currently not used by KVM.
Furthermore, simply rebuilding the "real" leaf does not resolve all of
KVM's woes when it comes to exposing a scattered CPUID feature, i.e.
keeping the function as documentation may be counter-productive in some
scenarios, e.g. when KVM needs to do more than simply expose the leaf.

[1] 47bdf3378d62 ("x86/cpuid: Provide get_scattered_cpuid_leaf()")
[2] b7b27aa011a1 ("KVM/x86: Update the reverse_cpuid list to include CPUID_7_EDX")

Signed-off-by: Sean Christopherson <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
CC: "H. Peter Anvin" <[email protected]>
CC: Ingo Molnar <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Radim Krčmář <[email protected]>
CC: Thomas Gleixner <[email protected]>
CC: x86-ml <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]

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