ARC: clockevent: Prepare for DT based probe

 - call clocksource_probe()
 - This in turns needs of_clk_init() to be called earlier

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Noam Camus <noamc@ezchip.com>
[vgupta: broken off from a bigger patch]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a876743..ae39434 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -10,8 +10,9 @@
 	def_bool y
 	select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
 	select BUILDTIME_EXTABLE_SORT
-	select COMMON_CLK
+	select CLKSRC_OF
 	select CLONE_BACKWARDS
+	select COMMON_CLK
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_FIND_FIRST_BIT