[PPC64LE] Temporarily disable VSX support in little-endian mode
[PPC64LE] Temporarily disable VSX support in little-endian mode

This is a preliminary patch for the PowerPC64LE support.  In stage 1
of the vector support, we will support the VMX (Altivec) instruction
set, but will not yet support the VSX instructions.  This is merely a
staging issue to provide functional vector support as soon as
possible.



git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@210271 91177308-0d34-0410-b5e6-96231b3b80d8

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