ARM: OMAP2+: Avoid mailbox legacy device creation for DT-boot

The legacy platform device for mailbox should not be created for
a DT boot, so adjust the platform device initialization logic
appropriately.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/devices.c

@@ -460,9 +460,9 @@ static int __init omap2_init_devices(void)
 	omap_init_audio();
 	omap_init_camera();
 	omap_init_hdmi_audio();
-	omap_init_mbox();
 	/* If dtb is there, the devices will be created dynamically */
 	if (!of_have_populated_dt()) {
+		omap_init_mbox();
 		omap_init_mcspi();
 		omap_init_sham();
 		omap_init_aes();