dm: core: Drop header files from dm/test.h

These header file should not be included in other header files. Remove
them and add to each individual file. Add test/test.h to test/ui.h since
that is a reasonable place.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/dm/remoteproc.c b/test/dm/remoteproc.c
index 9511c7d..c6bf2c4 100644
--- a/test/dm/remoteproc.c
+++ b/test/dm/remoteproc.c
@@ -10,7 +10,9 @@
 #include <remoteproc.h>
 #include <asm/io.h>
 #include <dm/test.h>
+#include <test/test.h>
 #include <test/ut.h>
+
 /**
  * dm_test_remoteproc_base() - test the operations after initializations
  * @uts:	unit test state