Add helper functions for memory compression to CSR

Signed-off-by: Slawomir Milczarek <slawomir.milczarek@intel.com>

shared/source/command_stream/memory_compression_state.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2020 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#pragma once
+
+namespace NEO {
+enum class MemoryCompressionState {
+    Disabled = 0x0u,
+    Enabled = 0x1u,
+    NotApplicable = 0x2u
+};
+} // namespace NEO