VFP available on a single CPU in a dual-CPU complex

[Florian Fainelli]

Hello,

On Broadcom's BCM63138 SoC, the second Cortex A9 CPU does not have
VFP, which is a problem as one might imagine because we currently
assume it is available for all CPUs within the complex.

I started to patch vfp_support_entry to test for CPU1 and branch to a
different location, but that raises a bunch of question, in particular
what to do if NEON/VFP came from the kernel, how can we migrate that
execution to CPU0?

If the answer is don't use VFP, I guess that's fine, and I can have a
runtime check in vfp_init() that checks for BCM63138 and set
vfp_vector to vfp_null_entry even though we are running on a multi-v7
kernel with VFP enabled.

Thanks!
-- 
Florian