[PATCH] kunit: Include missing header

[Bo Liu <liubo03@xxxxxxxxxx>]

The file debugfs.c missed the header debugfs.h, which
resulted on the following warning:

lib/kunit/debugfs.c:28:6: warning: no previous prototype for 'kunit_debugfs_cleanup' [-Wmissing-prototypes]
 void kunit_debugfs_cleanup(void)
      ^~~~~~~~~~~~~~~~~~~~~
lib/kunit/debugfs.c:33:6: warning: no previous prototype for 'kunit_debugfs_init' [-Wmissing-prototypes]
 void kunit_debugfs_init(void)
      ^~~~~~~~~~~~~~~~~~
lib/kunit/debugfs.c:92:6: warning: no previous prototype for 'kunit_debugfs_create_suite' [-Wmissing-prototypes]
 void kunit_debugfs_create_suite(struct kunit_suite *suite)
      ^~~~~~~~~~~~~~~~~~~~~~~~~~
lib/kunit/debugfs.c:108:6: warning: no previous prototype for 'kunit_debugfs_destroy_suite' [-Wmissing-prototypes]
 void kunit_debugfs_destroy_suite(struct kunit_suite *suite)

Signed-off-by: Bo Liu <liubo03@xxxxxxxxxx>
---
 lib/kunit/debugfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c
index 1048ef1b8d6e..83411075f614 100644
--- a/lib/kunit/debugfs.c
+++ b/lib/kunit/debugfs.c
@@ -10,6 +10,7 @@
 #include <kunit/test.h>
 
 #include "string-stream.h"
+#include "debugfs.h"
 
 #define KUNIT_DEBUGFS_ROOT             "kunit"
 #define KUNIT_DEBUGFS_RESULTS          "results"
-- 
2.27.0