hw/char: RX62N serial communication interface (SCI)

This module supported only non FIFO type.
Hardware manual.
https://www.renesas.com/us/en/doc/products/mpumcu/doc/rx_family/r01uh0033ej0140_rx62n.pdf

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200224141923.82118-17-ysato@users.sourceforge.jp>
[PMD: Filled VMStateField for migration]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index e4ade67..e921501 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1971,9 +1971,11 @@
 M: Yoshinori Sato <ysato@users.sourceforge.jp>
 R: Magnus Damm <magnus.damm@gmail.com>
 S: Maintained
+F: hw/char/renesas_sci.c
 F: hw/char/sh_serial.c
 F: hw/timer/renesas_*.c
 F: hw/timer/sh_timer.c
+F: include/hw/char/renesas_sci.h
 F: include/hw/sh4/sh.h
 F: include/hw/timer/renesas_*.h