anv/entrypoints: Use the function pointer types provided by vulkan.h

This is a bit cleaner than generating the types ourselves when making the
table.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Emil Velikov <emil.velikov@collabora.com>
Cc: "12.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 9ed0d9dd06)

src/intel/vulkan/anv_entrypoints_gen.py

@@ -113,7 +113,7 @@ if opt_header:
 
     for type, name, args, num, h in entrypoints:
         print_guard_start(name)
-        print "         %s (*%s)%s;" % (type, name, args)
+        print "         PFN_vk{0} {0};".format(name)
         print_guard_end(name)
     print "      };\n"
     print "   };\n"