DT bindings for the Renesas R-Car and RZ/G Reset Controllers

The R-Car and RZ/G Reset Controllers provide reset control, and implement the
following functions:
  - Latching of the levels on mode pins when PRESET# is negated,
  - Mode monitoring register,
  - Reset control of peripheral devices (on R-Car Gen1),
  - Watchdog timer (on R-Car Gen1),
  - Register-based reset control and boot address registers for the various CPU
    cores (on R-Car Gen2 and Gen3, and on RZ/G).


Required properties:
  - compatible: Should be
		  - "renesas,<soctype>-reset-wdt" for R-Car Gen1,
		  - "renesas,<soctype>-rst" for R-Car Gen2 and Gen3, and RZ/G
		Examples with soctypes are:
		  - "renesas,r8a7743-rst" (RZ/G1M)
		  - "renesas,r8a7744-rst" (RZ/G1N)
		  - "renesas,r8a7745-rst" (RZ/G1E)
		  - "renesas,r8a77470-rst" (RZ/G1C)
		  - "renesas,r8a774a1-rst" (RZ/G2M)
		  - "renesas,r8a774c0-rst" (RZ/G2E)
		  - "renesas,r8a7778-reset-wdt" (R-Car M1A)
		  - "renesas,r8a7779-reset-wdt" (R-Car H1)
		  - "renesas,r8a7790-rst" (R-Car H2)
		  - "renesas,r8a7791-rst" (R-Car M2-W)
		  - "renesas,r8a7792-rst" (R-Car V2H
		  - "renesas,r8a7793-rst" (R-Car M2-N)
		  - "renesas,r8a7794-rst" (R-Car E2)
		  - "renesas,r8a7795-rst" (R-Car H3)
		  - "renesas,r8a7796-rst" (R-Car M3-W)
		  - "renesas,r8a77965-rst" (R-Car M3-N)
		  - "renesas,r8a77970-rst" (R-Car V3M)
		  - "renesas,r8a77980-rst" (R-Car V3H)
		  - "renesas,r8a77990-rst" (R-Car E3)
		  - "renesas,r8a77995-rst" (R-Car D3)
  - reg: Address start and address range for the device.


Example:

	rst: reset-controller@e6160000 {
		compatible = "renesas,r8a7795-rst";
		reg = <0 0xe6160000 0 0x0200>;
	};