anv: Make entrypoint resolution take a gen_device_info

In order for things such as the ANV_CALL and the ifuncs to work, we used to
have a singleton gen_device_info structure that got assigned the first time
you create a device.  Given that the driver will never be used
simultaneously on two different generations of hardware, this was fairly
safe to do.  However, it has caused a few hickups and isn't, in general, a
good plan.  Now that the two primary reasons for this singleton are gone,
we can get rid of it and make things quite a bit safer.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/anv_private.h

@@ -1805,7 +1805,8 @@ struct anv_query_pool {
    struct anv_bo                                bo;
 };
 
-void *anv_lookup_entrypoint(const char *name);
+void *anv_lookup_entrypoint(const struct gen_device_info *devinfo,
+                            const char *name);
 
 void anv_dump_image_to_ppm(struct anv_device *device,
                            struct anv_image *image, unsigned miplevel,