MAINTAINERS: Fix TCI file pattern

tcg/tci is a directory, so for recursive semantics add a trailing slash.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Stefan Weil <sw@weilnetz.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index ea32786..7781023 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -638,4 +638,4 @@
 TCI target
 M: Stefan Weil <sw@weilnetz.de>
 S: Maintained
-F: tcg/tci
+F: tcg/tci/