[PATCH] aarch64: Remove version dependencies from features

[Nick Clifton]

Hi Andrew,

> Many instructions were enabled only when both a feature flag and a minimum
> architecture version are specified.  This behaviour differs from GCC, which (in
> most cases) allows features to be enabled at any architecture version.
> 
> There is no need for the toolchain to restrict combinations of unrelated
> features in this way, so this patch removes the unnecessary dependencies.

Patch approved - please apply.

Cheers
   Nick