h8300: remove stale bindings and symlink

These four files are left over from the h8300 removal.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/clock/renesas,h8s2678-pll-clock.txt

@@ -1,23 +0,0 @@
-Renesas H8S2678 PLL clock
-
-This device is Clock multiplyer
-
-Required Properties:
-
-  - compatible: Must be "renesas,h8s2678-pll-clock"
-
-  - clocks: Reference to the parent clocks
-
-  - #clock-cells: Must be 0
-
-  - reg: Two rate selector (Multiply / Divide) register address
-
-Example
--------
-
-		pllclk: pllclk {
-			compatible = "renesas,h8s2678-pll-clock";
-			clocks = <&xclk>;
-			#clock-cells = <0>;
-			reg = <0xfee03b 2>, <0xfee045 2>;
-		};

Documentation/devicetree/bindings/timer/renesas,16bit-timer.txt

@@ -1,25 +0,0 @@
-* Renesas H8/300 16bit timer
-
-The 16bit timer is a 16bit timer/counter with configurable clock inputs and
-programmable compare match.
-
-Required Properties:
-
-  - compatible: must contain "renesas,16bit-timer"
-  - reg: base address and length of the registers block for the timer module.
-  - interrupts: interrupt-specifier for the timer, IMIA
-  - clocks: a list of phandle, one for each entry in clock-names.
-  - clock-names: must contain "peripheral_clk" for the functional clock.
-  - renesas,channel: timer channel number.
-
-Example:
-
-	timer16: timer@ffff68 {
-		compatible = "reneas,16bit-timer";
-		reg = <0xffff68 8>, <0xffff60 8>;
-		interrupts = <24>;
-		renesas,channel = <0>;
-		clocks = <&pclk>;
-		clock-names = "peripheral_clk";
-	};
-

Documentation/devicetree/bindings/timer/renesas,8bit-timer.txt

@@ -1,25 +0,0 @@
-* Renesas H8/300 8bit timer
-
-The 8bit timer is a 8bit timer/counter with configurable clock inputs and
-programmable compare match.
-
-This implement only supported cascade mode.
-
-Required Properties:
-
-  - compatible: must contain "renesas,8bit-timer"
-  - reg: base address and length of the registers block for the timer module.
-  - interrupts: interrupt-specifier for the timer, CMIA and TOVI
-  - clocks: a list of phandle, one for each entry in clock-names.
-  - clock-names: must contain "fck" for the functional clock.
-
-Example:
-
-	timer8_0: timer@ffff80 {
-		compatible = "renesas,8bit-timer";
-		reg = <0xffff80 10>;
-		interrupts = <36>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-

scripts/dtc/include-prefixes/h8300

@@ -1 +0,0 @@
-../../../arch/h8300/boot/dts