[PATCH] ARM: Enable DP copy, load and store instructions for FPv4-SP

[Oliver Stannard]

I could split the patch up, but it would not be testable until the last patch, which would remove the condition at about lib/Target/ARM/ARMISelLowering.cpp:411, which makes f64 a legal type. If I committed this patch first, this would introduce regressions until the last patch is applied. Is this still worth doing?

http://reviews.llvm.org/D4907