anv: remove the LOCAL_MEM allocation bit

We always want to use local memory if possible, we'll just add the
system memory heap if the buffer needs to be host visible.

v2: Drop some usages of ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17873>

src/intel/vulkan/anv_private.h

@@ -1368,11 +1368,8 @@ enum anv_bo_alloc_flags {
    /** This buffer has implicit CCS data attached to it */
    ANV_BO_ALLOC_IMPLICIT_CCS = (1 << 9),
 
-   /** This buffer is allocated from local memory */
-   ANV_BO_ALLOC_LOCAL_MEM = (1 << 10),
-
    /** This buffer is allocated from local memory and should be cpu visible */
-   ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE = (1 << 11),
+   ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE = (1 << 10),
 };
 
 VkResult anv_device_alloc_bo(struct anv_device *device,