Vulkan: correctly expose Vulkan entry points

This change fixes the advertisement of core Vulkan entry points as below:
1. GIPA returns a valid checked_proc for 1.1 core device APIs.
2. GDPA returns NULL for 1.1 core device APIs on a 1.0 physical device.

Bug: 134185757
Bug: 142266108
Test: dEQP-VK.memory.binding on 1.1 loader and 1.0 device ICD
Test: dEQP-VK.api.info.instance on 1.1 loader and 1.0 instance ICD
Change-Id: I0a3e06dc04bade4f36a7e68ee2f53979c656ee4e
diff --git a/vulkan/libvulkan/driver_gen.h b/vulkan/libvulkan/driver_gen.h
index cd7d8f8..43c4d14 100644
--- a/vulkan/libvulkan/driver_gen.h
+++ b/vulkan/libvulkan/driver_gen.h
@@ -49,7 +49,8 @@
         KHR_bind_memory2,
         KHR_get_physical_device_properties2,
 
-        EXTENSION_CORE,  // valid bit
+        EXTENSION_CORE_1_0,
+        EXTENSION_CORE_1_1,
         EXTENSION_COUNT,
         EXTENSION_UNKNOWN,
     };