test: dm: Move the time test over to the ut command

Unify the command for running unit tests further by moving the "ut_time"
command over to "ut time".

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/test/Makefile b/test/Makefile
index 3d9968c..0f5de57 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -8,4 +8,4 @@
 obj-$(CONFIG_UNIT_TEST) += ut.o
 obj-$(CONFIG_SANDBOX) += command_ut.o
 obj-$(CONFIG_SANDBOX) += compression.o
-obj-$(CONFIG_CMD_UT_TIME) += time_ut.o
+obj-$(CONFIG_UT_TIME) += time_ut.o