MAINTAINERS: Add tests/decode/ to the "Overall TCG CPUs" section

The tests/decode/ folder belongs to scripts/decodetree.py, so
it should be listed in the same section as the script.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/MAINTAINERS b/MAINTAINERS
index ff1238b..695e0bd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -174,6 +174,7 @@
 F: host/include/*/host/cpuinfo.h
 F: util/cpuinfo-*.c
 F: include/tcg/
+F: tests/decode/
 
 FPU emulation
 M: Aurelien Jarno <aurelien@aurel32.net>