msm: pm-8x60: Move hotplug related code out of pm code.

Move hotplug related code into hotplug.c and compile hotplug.c only when
CONFIG_HOTPLUG_CPU is defined.

Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
Change-Id: Ia9aa7a64e9831f52431c77c22f30fb64892efaea
diff --git a/arch/arm/mach-msm/no-pm.c b/arch/arm/mach-msm/no-pm.c
index d6cdbe7..366b282 100644
--- a/arch/arm/mach-msm/no-pm.c
+++ b/arch/arm/mach-msm/no-pm.c
@@ -23,5 +23,13 @@
 void msm_pm_set_platform_data(struct msm_pm_platform_data *data, int count)
 { }
 
+void msm_pm_cpu_enter_lowpower(unsigned cpu)
+{
+	asm("wfi"
+		:
+		:
+		: "memory", "cc");
+}
+
 void msm_pm_set_max_sleep_time(int64_t max_sleep_time_ns) { }
 EXPORT_SYMBOL(msm_pm_set_max_sleep_time);