Add UART support to r8a7743

This series aims at adding UART support to r8a7743 by backporting the relevant patches from upstream.
As per upstream, since two of the serial interfaces live on the camera daughter board, we rework the DT architecture to better accomodate all the possible HW variants.

Finally, in order to get CTS/RTS to work this series backports fixes made by Geert some time ago.

Thanks,
Fabrizio

Biju Das (1):
? ARM: dts: iwg20d-q7: Add chosen node

Fabrizio Castro (3):
? ARM: dts: iwg20d-q7: Rework DT architecture
? ARM: dts: iwg20d-q7-dbcm-ca: Add device trees for camera DB ? ARM: dts: iwg20d-q7: Add support for ttySC3

Geert Uytterhoeven (11):
? serial: sh-sci: Update DT binding documentation for GPIO modem lines ? serial: sh-sci: Update DT binding documentation for dedicated RTS/CTS ? serial: sh-sci: Always set TIOCM_CTS in .get_mctrl() callback ? serial: sh-sci: Add support for GPIO-controlled modem lines ? serial: sh-sci: Do not open-code sci_getreg()
? serial: sh-sci: Add more Serial Port Register documentation ? serial: sh-sci: Add more Serial Port Control/Data Register ????documentation
? serial: sh-sci: Correct pin initialization on (H)SCIF
? serial: sh-sci: Add pin initialization for SCIFA/SCIFB
? serial: sh-sci: Fix support for hardware-assisted RTS/CTS ? serial: sh-sci: Add DT support for dedicated RTS/CTS

?.../bindings/serial/renesas,sci-serial.txt?????????|???4 +
?arch/arm/boot/dts/Makefile?????????????????????????|???1 +
?arch/arm/boot/dts/iwg20d-q7-common.dtsi????????????| 127 +++++++++++++++
?arch/arm/boot/dts/iwg20d-q7-dbcm-ca.dtsi???????????|??43 +++++
?arch/arm/boot/dts/r8a7743-iwg20d-q7-dbcm-ca.dts????|??19 +++
?arch/arm/boot/dts/r8a7743-iwg20d-q7.dts????????????| 100 +-----------
?drivers/tty/serial/Kconfig?????????????????????????|???1 +
?drivers/tty/serial/sh-sci.c????????????????????????| 177 ++++++++++++++++++---
?drivers/tty/serial/sh-sci.h????????????????????????|??24 ++-

?9 files changed, 365 insertions(+), 131 deletions(-) ?create mode 100644 arch/arm/boot/dts/iwg20d-q7-common.dtsi ?create mode 100644 arch/arm/boot/dts/iwg20d-q7-dbcm-ca.dtsi ?create mode 100644 arch/arm/boot/dts/r8a7743-iwg20d-q7-dbcm-ca.dts