soc: ti: pm33xx: Add a print while entering RTC only mode with DDR in self-refresh

Currently there is no way to distinguish if the SoC entered DS0
mode or the RTC only mode. Hence add a print before entering
the RTC only mode.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/soc/ti/pm33xx.c

@@ -178,6 +178,7 @@ static int am33xx_pm_suspend(suspend_state_t suspend_state)
 					  suspend_wfi_flags);
 
 		suspend_wfi_flags &= ~WFI_FLAG_RTC_ONLY;
+		dev_info(pm33xx_dev, "Entering RTC Only mode with DDR in self-refresh\n");
 
 		if (!ret) {
 			clk_restore_context();