usb: renesas_usbhs: Add device tree support for R-Car H2 and M2

This driver supports other SoCs, but they need boards/Soc depend code. So, this patch adds device tree support for R-Car H2 and M2 initially.

Changes from v2:
- Add "Acked-by: Kuninori Morimoto <[email protected]>".

Changes from v1:
- Change an optional property name from "buswait_bwait" to "buswait" in patch 1.
- Add the prefix "renesas," to "buswait" and "enable-gpio" in patch 1.
- Modify the usbhs_parse_dt() to remove the check of some of_device_is_compatible() in patch 2.

Yoshihiro Shimoda (2):
usb: renesas_usbhs: Add device tree bindings documentation
usb: renesas_usbhs: Add device tree support for R-Car H2 and M2

 .../devicetree/bindings/usb/renesas_usbhs.txt      |   24 +++++++++++
 drivers/usb/renesas_usbhs/common.c                 |   44 ++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/renesas_usbhs.txt

1.7.9.5