ARMv7k: define __ARM_PCS_VFP since we're hard-float.
ARMv7k: define __ARM_PCS_VFP since we're hard-float.

It's a little debateable because we're not truly AAPCS, so I'm
certainly not going to define __ARM_PCS, but __ARM_PCS_VFP seems to be
really an "hard-float" define, which is a useful thing to have.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@267880 91177308-0d34-0410-b5e6-96231b3b80d8

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