ARM: 6753/1: omap4: Enable ARM local timers with OMAP4430 es1.0 exception

On OMAP4430 ES1.0 the local timers are gated by security. Enable the
CONFIG_LOCAL_TIMERS for omap2plus build and handle the OMAP4430 es1.0
exception case.

This patch has dependency on the first patch in this series.
	ARM: smp: Select local timers vs dummy timer support runtime

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-omap2/Kconfig

@@ -44,6 +44,7 @@ config ARCH_OMAP4
 	depends on ARCH_OMAP2PLUS
 	select CPU_V7
 	select ARM_GIC
+	select LOCAL_TIMERS if SMP
 	select PL310_ERRATA_588369
 	select ARM_ERRATA_720789
 	select ARCH_HAS_OPP

arch/arm/mach-omap2/timer-mpu.c

@@ -28,6 +28,10 @@
  */
 int __cpuinit local_timer_setup(struct clock_event_device *evt)
 {
+	/* Local timers are not supprted on OMAP4430 ES1.0 */
+	if (omap_rev() == OMAP4430_REV_ES1_0)
+		return -ENXIO;
+
 	evt->irq = OMAP44XX_IRQ_LOCALTIMER;
 	twd_timer_setup(evt);
 	return 0;