dt-bindings: watchdog: Consolidate SP805 binding docs

Consolidate two SP805 binding documents "arm,sp805.txt" and
"sp805-wdt.txt" into "arm,sp805.txt" that matches the naming of the
desired compatible string to be used
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/arm,sp805.txt

 ARM AMBA Primecell SP805 Watchdog
 
+SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
+can be used to identify the peripheral type, vendor, and revision.
+This value can be used for driver matching.
+
+As SP805 WDT is a primecell IP, it follows the base bindings specified in
+'arm/primecell.txt'
+
 Required properties:
 - compatible:  Should be "arm,sp805" & "arm,primecell"
-- reg: Should contain location and length for watchdog timer register.
-- interrupts: Should contain the list of watchdog timer interrupts.
-- clocks: clocks driving the watchdog timer hardware. This list should be 2
-	clocks. With 2 clocks, the order is wdogclk clock, apb_pclk.
+- reg:         Should contain location and length for watchdog timer register
+- clocks:      Clocks driving the watchdog timer hardware. This list should be
+               2 clocks. With 2 clocks, the order is wdog_clk, apb_pclk
+               wdog_clk can be equal to or be a sub-multiple of the apb_pclk
+               frequency
+- clock-names: Shall be "wdog_clk" for first clock and "apb_pclk" for the
+               second one
+
+Optional properties:
+- interrupts:  Should specify WDT interrupt number
 
 Example:
 	watchdog@66090000 {
 		compatible = "arm,sp805", "arm,primecell";
 		reg = <0x66090000 0x1000>;
 		interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&apb_pclk>,<&apb_pclk>;
-		clock-names = "wdogclk", "apb_pclk";
+		clocks = <&wdt_clk>, <&apb_pclk>;
+		clock-names = "wdog_clk", "apb_pclk";
 	};

Documentation/devicetree/bindings/watchdog/sp805-wdt.txt

-* ARM SP805 Watchdog Timer (WDT) Controller
-
-SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
-can be used to identify the peripheral type, vendor, and revision.
-This value can be used for driver matching.
-
-As SP805 WDT is a primecell IP, it follows the base bindings specified in
-'arm/primecell.txt'
-
-Required properties:
-- compatible : Should be "arm,sp805-wdt", "arm,primecell"
-- reg : Base address and size of the watchdog timer registers.
-- clocks : From common clock binding.
-           First clock is PCLK and the second is WDOGCLK.
-           WDOGCLK can be equal to or be a sub-multiple of the PCLK frequency.
-- clock-names : From common clock binding.
-                Shall be "apb_pclk" for first clock and "wdog_clk" for the
-                second one.
-
-Optional properties:
-- interrupts : Should specify WDT interrupt number.
-
-Examples:
-
-		cluster1_core0_watchdog: wdt@c000000 {
-			compatible = "arm,sp805-wdt", "arm,primecell";
-			reg = <0x0 0xc000000 0x0 0x1000>;
-			clocks = <&clockgen 4 3>, <&clockgen 4 3>;
-			clock-names = "apb_pclk", "wdog_clk";
-		};
-