anv: Use a single global API patch version

The Vulkan API has only one patch version shared among all of the
major.minor versions.  We should also advertise the same patch version
regardless of major.minor.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106941
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2 files changed