arm64: report vfpv3 instead of vfpv3d16

vfpv3 is the correct version for an ARMv8 processor and it is the
version reported by an A15.

Change-Id: I486f3af21a352c27775888cca332a48d7e0c59ce
Signed-off-by: Alex Van Brunt <avanbrunt@nvidia.com>
Reviewed-on: http://git-master/r/370076