riscv: Move Andes PLMT driver to drivers/timer

This is a regular timer driver, and should live with the other timer
drivers.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index 3a4d74b..dd4f9cc 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -5,6 +5,7 @@
 obj-y += timer-uclass.o
 obj-$(CONFIG_AG101P_TIMER) += ag101p_timer.o
 obj-$(CONFIG_ALTERA_TIMER)	+= altera_timer.o
+obj-$(CONFIG_ANDES_PLMT) += andes_plmt_timer.o
 obj-$(CONFIG_ARC_TIMER)	+= arc_timer.o
 obj-$(CONFIG_AST_TIMER)	+= ast_timer.o
 obj-$(CONFIG_ATCPIT100_TIMER) += atcpit100_timer.o