intel: add intel_dev and intel_queue

These will be our internal representations of XGL_DEVICE and XGL_QUEUE.
diff --git a/icd/intel/intel.h b/icd/intel/intel.h
index 7075b6c..7286039 100644
--- a/icd/intel/intel.h
+++ b/icd/intel/intel.h
@@ -40,4 +40,6 @@
 
 #define INTEL_GEN(gen) ((int) ((gen) * 100))
 
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
 #endif /* INTEL_H */