nds32: Support AG101P timer DM.

Support AG101P timer device tree flow.

Signed-off-by: rick <rick@andestech.com>
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index bfe65fc..3dad956 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -12,3 +12,4 @@
 obj-$(CONFIG_AST_TIMER)	+= ast_timer.o
 obj-$(CONFIG_STI_TIMER)		+= sti-timer.o
 obj-$(CONFIG_ARC_TIMER)	+= arc_timer.o
+obj-$(CONFIG_AG101P_TIMER) += ag101p_timer.o