anv: Suffix anv-private 'VK' tokens with 'ANV'

anv: Suffix anv-private 'VK' tokens with 'ANV'

I saw VK_IMAGE_ASPECT_ANY_COLOR_BIT while hacking anv_formats.c and got
confused. "Huh? What extension added that?". No extension defines it;
anv_private.h defines it.

To remove confusion, rename the anv-private VK tokens as if they were
extension tokens with the ANV vendor suffix.

I found only two such tokens:

    VK_IMAGE_ASPECT_ANY_COLOR_BIT
    VK_IMAGE_ASPECT_PLANES_BITS

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>