[POWERPC] PS3: System manager support

Add PS3 system manager support and the ppc_md routines restart() and
power_off().

The system manager provides an event notification mechanism for reporting
events like thermal alert and button presses.  It also provides support to
control system shutdown and startup.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/ps3/Makefile b/drivers/ps3/Makefile
index 96958c0..e251d1c 100644
--- a/drivers/ps3/Makefile
+++ b/drivers/ps3/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_PS3_VUART) += vuart.o
 obj-$(CONFIG_PS3_PS3AV) += ps3av.o ps3av_cmd.o
+obj-$(CONFIG_PS3_SYS_MANAGER) += sys-manager.o