vulkan/wsi/x11: add support to detect if we can support rendering (v3)

This adds support to radv_GetPhysicalDeviceXlibPresentationSupportKHR
and radv_GetPhysicalDeviceXcbPresentationSupportKHR to check if the
local device file descriptor is compatible with the descriptor
retrieved from the X server via DRI3.

This will stop radv binding to an X server until we have prime
support in place. Hopefully apps use this API before trying
to render things.

v2: drop unneeded function, don't leak memory. (jekstrand)
v3: also check in surface_get_support callback.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/intel/vulkan/anv_device.c

@@ -202,7 +202,7 @@ anv_physical_device_init(struct anv_physical_device *device,
 
    isl_device_init(&device->isl_dev, &device->info, swizzled);
 
-   close(fd);
+   device->local_fd = fd;
    return VK_SUCCESS;
 
 fail:
@@ -215,6 +215,7 @@ anv_physical_device_finish(struct anv_physical_device *device)
 {
    anv_finish_wsi(device);
    ralloc_free(device->compiler);
+   close(device->local_fd);
 }
 
 static const VkExtensionProperties global_extensions[] = {