arm: kconfig: dis-allow hotplug on MSM

MSM doesn't support hotplug, so we prevent it from being
selected in Kconfig.

Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1a61017..c8fa144 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1284,6 +1284,7 @@
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 	depends on SMP && HOTPLUG && EXPERIMENTAL
+	depends on !ARCH_MSM
 	help
 	  Say Y here to experiment with turning CPUs off and on.  CPUs
 	  can be controlled through /sys/devices/system/cpu.