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/Makefile b/drivers/timer/Makefile
index ee2fcb1..0c8a627 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -5,6 +5,7 @@
 obj-y += timer-uclass.o
 obj-$(CONFIG_ALTERA_TIMER)	+= altera_timer.o
 obj-$(CONFIG_CADENCE_TTC_TIMER)	+= cadence-ttc.o
+obj-$(CONFIG_DESIGNWARE_APB_TIMER)	+= dw-apb-timer.o
 obj-$(CONFIG_SANDBOX_TIMER)	+= sandbox_timer.o
 obj-$(CONFIG_X86_TSC_TIMER)	+= tsc_timer.o
 obj-$(CONFIG_OMAP_TIMER)	+= omap-timer.o