drivers: timer: omap_timer: add timer driver for omap devices based on dm

Adding a timer driver for omap devices based on driver model
and device tree.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index fe954eca..f351fbb 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -8,3 +8,4 @@
 obj-$(CONFIG_ALTERA_TIMER)	+= altera_timer.o
 obj-$(CONFIG_SANDBOX_TIMER)	+= sandbox_timer.o
 obj-$(CONFIG_X86_TSC_TIMER)	+= tsc_timer.o
+obj-$(CONFIG_OMAP_TIMER)	+= omap-timer.o