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/common/Makefile b/common/Makefile
index 1c81fcf..382dd01 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -140,6 +140,7 @@
 COBJS-y += xyzModem.o
 COBJS-y += cmd_mac.o
 COBJS-$(CONFIG_CMD_MFSL) += cmd_mfsl.o
+COBJS-$(CONFIG_MP) += cmd_mp.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(AOBJS:.o=.S) $(COBJS:.o=.c)