timer: Add Cadence TTC timer counter support

This driver was tested on Xilinx ZynqMP SoC.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index 2c96896..8a31397 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -52,6 +52,13 @@
 	  it is designed to offer maximum accuracy and efficient management,
 	  even for systems with long response time.
 
+config CADENCE_TTC_TIMER
+	bool "Cadence TTC (Triple Timer Counter)"
+	depends on TIMER
+	help
+	  Enables support for the cadence ttc driver. This driver is present
+	  on Xilinx Zynq and ZynqMP SoCs.
+
 config SANDBOX_TIMER
 	bool "Sandbox timer support"
 	depends on SANDBOX && TIMER