MAINTAINERS: Add missing entry to filelist for TCI target

tci.c is also a maintained part of the TCI implementation.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/MAINTAINERS b/MAINTAINERS
index d128ed0..4d634f2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -842,6 +842,7 @@
 M: Stefan Weil <sw@weilnetz.de>
 S: Maintained
 F: tcg/tci/
+F: tci.c
 
 Stable branches
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