x86: Add a few common Intel CPU functions

Add functions to query CPU information, needed for ACPI.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/acpi/acpigen.h

@@ -73,6 +73,18 @@ enum {
 	RETURN_OP		= 0xa4,
 };
 
+/**
+ * enum psd_coord - Coordination types for P-states
+ *
+ * The type of coordination that exists (hardware) or is required (software) as
+ * a result of the underlying hardware dependency
+ */
+enum psd_coord {
+	SW_ALL = 0xfc,
+	SW_ANY = 0xfd,
+	HW_ALL = 0xfe
+};
+
 /**
  * acpigen_get_current() - Get the current ACPI code output pointer
  *