ARM: clocksource: Add asm9260_timer driver

In some cases asm9260 looks similar to iMX2x. One of exceptions is
timer controller. So this patch introduces new driver for this special case.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index fc01ec2..bfaaae4 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -229,4 +229,14 @@
 	depends on MIPS_GIC
 	select CLKSRC_OF
 
+config ASM9260_TIMER
+	bool "Alphascale ASM9260 timer driver"
+	depends on GENERIC_CLOCKEVENTS
+	select CLKSRC_MMIO
+	select CLKSRC_OF
+	default y if MACH_ASM9260
+	help
+	  This enables build of a clocksource and clockevent driver for
+	  the 32-bit System Timer hardware available on a Alphascale ASM9260.
+
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