timer: dw-apb: Add Designware APB timer driver

Add timer driver for the Designware APB Timer IP. This is present
for example on the Altera SoCFPGA chips.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index 8a31397..5ab6749 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -59,6 +59,13 @@
 	  Enables support for the cadence ttc driver. This driver is present
 	  on Xilinx Zynq and ZynqMP SoCs.
 
+config DESIGNWARE_APB_TIMER
+	bool "Designware APB Timer"
+	depends on TIMER
+	help
+	  Enables support for the Designware APB Timer driver. This timer is
+	  present on Altera SoCFPGA SoCs.
+
 config SANDBOX_TIMER
 	bool "Sandbox timer support"
 	depends on SANDBOX && TIMER