test: build dependency for event unit tests

The test_event_base and test_event_probe unit tests use function
event_register() which depends on CONFIG_EVENT_DYNAMIC=y.

Fixes: 7d02645 ("event: Add a simple test")
Signed-off-by: Heinrich Schuchardt <[email protected]>
Reviewed-by: Simon Glass <[email protected]>

test/common/Makefile

@@ -2,5 +2,5 @@
 obj-y += cmd_ut_common.o
 obj-$(CONFIG_AUTOBOOT) += test_autoboot.o
 obj-$(CONFIG_CYCLIC) += cyclic.o
-obj-$(CONFIG_EVENT) += event.o
+obj-$(CONFIG_EVENT_DYNAMIC) += event.o
 obj-y += cread.o