OMAP3: PM: CPUidle: support retention and off-mode C-states

This patch adds support and enables state C4(MPU RET + CORE RET)
and MPU OFF states (C3 and C5.)

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 2edf1ba..379e350 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -19,6 +19,8 @@
 extern void *omap3_secure_ram_storage;
 extern void omap3_pm_off_mode_enable(int);
 extern void omap_sram_idle(void);
+extern int omap3_can_sleep(void);
+extern int set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
 
 extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm);
 extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state);