ARM: OMAP4: PM: Add power domain statistics support

Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: NJean Pihet <j-pihet@ti.com>
Reviewed-by: NKevin Hilman <khilman@ti.com>
Tested-by: NVishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: NKevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/omap-mpuss-lowpower.c

@@ -256,6 +256,8 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
 		return -ENXIO;
 	}
 
+	pwrdm_pre_transition();
+
 	/*
 	 * Check MPUSS next state and save interrupt controller if needed.
 	 * In MPUSS OSWR or device OFF, interrupt controller  contest is lost.
@@ -288,6 +290,8 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
 	wakeup_cpu = smp_processor_id();
 	set_cpu_next_pwrst(wakeup_cpu, PWRDM_POWER_ON);
 
+	pwrdm_post_transition();
+
 	return 0;
 }