x64: add arch-independent names for cli/sti

arch/x64/arch.hh

+#ifndef ARCH_HH_
+#define ARCH_HH_
+
+#include "processor.hh"
+
+// namespace arch - architecture independent interface for architecture
+//                  dependent operations (e.g. irq_disable vs. cli)
+
+namespace arch {
+
+inline void irq_disable()
+{
+    processor::cli();
+}
+
+inline void irq_enable()
+{
+    processor::sti();
+}
+
+}
+
+
+#endif /* ARCH_HH_ */