tcg: Add myself to general TCG maintainership

Acked-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index 780f480..93ad19d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -781,6 +781,7 @@
 -------------------------
 Common code
 M: qemu-devel@nongnu.org
+M: Richard Henderson <rth@twiddle.net>
 S: Maintained
 F: tcg/