ARM: msm: Migrate msm_timer to CLOCKSOURCE_OF_DECLARE

This allows us to remove the init_time callback in the DT machine
descriptors, shrinking the code.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ba412e0..36dfd06 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -630,6 +630,7 @@
 	bool "Qualcomm MSM"
 	select ARCH_REQUIRE_GPIOLIB
 	select CLKDEV_LOOKUP
+	select CLKSRC_OF if OF
 	select COMMON_CLK
 	select GENERIC_CLOCKEVENTS
 	help