dt-bindings: fpga: Consolidate bridge properties

Consolidate bridge properties in a single file, instead of duplicating
the same optional property over and over again.

Acked-by: Alan Tull <atull@kernel.org>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>

Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt

@@ -3,10 +3,7 @@ Altera FPGA To SDRAM Bridge Driver
 Required properties:
 - compatible		: Should contain "altr,socfpga-fpga2sdram-bridge"
 
-Optional properties:
-- bridge-enable		: 0 if driver should disable bridge at startup
-			  1 if driver should enable bridge at startup
-			  Default is to leave bridge in current state.
+See Documentation/devicetree/bindings/fpga/fpga-bridge.txt for generic bindings.
 
 Example:
 	fpga_bridge3: fpga-bridge@ffc25080 {

Documentation/devicetree/bindings/fpga/altera-freeze-bridge.txt

@@ -10,10 +10,7 @@ Required properties:
 - compatible		: Should contain "altr,freeze-bridge-controller"
 - regs			: base address and size for freeze bridge module
 
-Optional properties:
-- bridge-enable		: 0 if driver should disable bridge at startup
-			  1 if driver should enable bridge at startup
-			  Default is to leave bridge in current state.
+See Documentation/devicetree/bindings/fpga/fpga-bridge.txt for generic bindings.
 
 Example:
 	freeze-controller@100000450 {

Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt

@@ -9,10 +9,7 @@ Required properties:
 - resets	: Phandle and reset specifier for this bridge's reset
 - clocks	: Clocks used by this module.
 
-Optional properties:
-- bridge-enable	: 0 if driver should disable bridge at startup.
-		  1 if driver should enable bridge at startup.
-		  Default is to leave bridge in its current state.
+See Documentation/devicetree/bindings/fpga/fpga-bridge.txt for generic bindings.
 
 Example:
 	fpga_bridge0: fpga-bridge@ff400000 {

Documentation/devicetree/bindings/fpga/fpga-bridge.txt

@@ -0,0 +1,13 @@
+FPGA Bridge Device Tree Binding
+
+Optional properties:
+- bridge-enable		: 0 if driver should disable bridge at startup
+			  1 if driver should enable bridge at startup
+			  Default is to leave bridge in current state.
+
+Example:
+	fpga_bridge3: fpga-bridge@ffc25080 {
+		compatible = "altr,socfpga-fpga2sdram-bridge";
+		reg = <0xffc25080 0x4>;
+		bridge-enable = <0>;
+	};

Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt

@@ -18,12 +18,8 @@ Required properties:
 - clocks		: input clock to IP
 - clock-names		: should contain "aclk"
 
-Optional properties:
-- bridge-enable		: 0 if driver should disable bridge at startup
-			  1 if driver should enable bridge at startup
-			  Default is to leave bridge in current state.
-
-See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings.
+See Documentation/devicetree/bindings/fpga/fpga-region.txt and
+Documentation/devicetree/bindings/fpga/fpga-bridge.txt for generic bindings.
 
 Example:
 	fpga-bridge@100000450 {