MAINTAINERS: Fix TCI file pattern

tcg/tci is a directory, so for recursive semantics add a trailing slash.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Acked-by: NStefan Weil <sw@weilnetz.de>

MAINTAINERS

@@ -638,4 +638,4 @@ F: tcg/sparc/
 TCI target
 M: Stefan Weil <sw@weilnetz.de>
 S: Maintained
-F: tcg/tci
+F: tcg/tci/