radv: enable variableMultisampleRate.

This is only relevant with 0 attachments. In that case we do nothing
on subpass switch already, and the pipeline is the authoritative
source of the number of samples, so this shouldn't change anything.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_device.c

@@ -502,7 +502,7 @@ void radv_GetPhysicalDeviceFeatures(
 		.shaderInt64                              = false,
 		.shaderInt16                              = false,
 		.sparseBinding                            = true,
-		.variableMultisampleRate                  = false,
+		.variableMultisampleRate                  = true,
 		.inheritedQueries                         = false,
 	};
 }