vulkan: move GetDeviceQueue_Bottom

Move it from loader.cpp to driver.cpp and rename it to
driver::GetDeviceQueue.  No functional change.

Change-Id: Ide8ebe044e62b8ef6fc64ac03dcc1d920f5bf9a6
diff --git a/vulkan/libvulkan/driver_gen.cpp b/vulkan/libvulkan/driver_gen.cpp
index 87987c8..b6081f0 100644
--- a/vulkan/libvulkan/driver_gen.cpp
+++ b/vulkan/libvulkan/driver_gen.cpp
@@ -268,7 +268,7 @@
         "vkGetDeviceQueue",
         ProcHook::DEVICE,
         ProcHook::EXTENSION_CORE,
-        reinterpret_cast<PFN_vkVoidFunction>(GetDeviceQueue_Bottom),
+        reinterpret_cast<PFN_vkVoidFunction>(GetDeviceQueue),
         nullptr,
         nullptr,
     },