85xx: Added support for multicore boot mechanism

Added the cpu command that provides a generic mechanism to get status,
reset, and release secondary cores in multicore processors.

Added support for using the ePAPR defined spin-table mechanism on 85xx.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/common.h b/include/common.h
index e03ead1..f496073 100644
--- a/include/common.h
+++ b/include/common.h
@@ -669,4 +669,11 @@
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
+/* Multicore arch functions */
+#ifdef CONFIG_MP
+int cpu_status(int nr);
+int cpu_reset(int nr);
+int cpu_release(int nr, unsigned long boot_addr, int argc, char *argv[]);
+#endif
+
 #endif	/* __COMMON_H_ */