arm: zynq: Move timer to generic location

Move zynq timer out of mach folder to generic location
and enable it.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index e507ab7..3167fda 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -31,6 +31,9 @@
 config VT8500_TIMER
 	bool
 
+config CADENCE_TTC_TIMER
+	bool
+
 config CLKSRC_NOMADIK_MTU
 	bool
 	depends on (ARCH_NOMADIK || ARCH_U8500)