anv: Stop using VK_TRUE/FALSE

anv: Stop using VK_TRUE/FALSE

We've been fairly inconsistent about this so we should really choose
whether we're going to use VK_TRUE/FALSE or the C boolean values.  The
Vulkan #defines are set to 1 and 0 respectively so it's the same value
as C gives you when you cast a boolean expression to an integer.  Since
there are several places where we set a VkBool32 to a C logical
expression, let's just embrace C booleans and stop using the VK defines.

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>