Disable VK_EXT_external_memory_dma_buf

Fixes test: dEQP-VK.api.info.device.extensions

Change-Id: Ic9584a8d2a45f6061e5332156c4eddcf729acd3a
diff --git a/src/intel/vulkan/anv_extensions.py b/src/intel/vulkan/anv_extensions.py
index ea4b9d0..37073c1 100755
--- a/src/intel/vulkan/anv_extensions.py
+++ b/src/intel/vulkan/anv_extensions.py
@@ -126,7 +126,7 @@
     Extension('VK_EXT_direct_mode_display',               1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
     Extension('VK_EXT_display_control',                   1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
     Extension('VK_EXT_display_surface_counter',           1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
-    Extension('VK_EXT_external_memory_dma_buf',           1, True),
+    Extension('VK_EXT_external_memory_dma_buf',           1, False),
     Extension('VK_EXT_external_memory_host',              1, False),
     Extension('VK_EXT_global_priority',                   1,
               'device->has_context_priority'),