[POWERPC] PS3: Select MEMORY_HOTPLUG

The PS3 uses the kernel's hotplug memory support, so make sure it is
always enabled when building for PS3.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
index b5122a7..9c5a15d 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -7,6 +7,7 @@
 	select USB_OHCI_BIG_ENDIAN_MMIO
 	select USB_ARCH_HAS_EHCI
 	select USB_EHCI_BIG_ENDIAN_MMIO
+	select MEMORY_HOTPLUG
 	help
 	  This option enables support for the Sony PS3 game console
 	  and other platforms using the PS3 hypervisor.