dt-bindings: irqchip: ti, sci-intr: Update bindings to drop the usage of gic as parent

Drop the firmware related dt-bindings and use the hardware specified
interrupt numbers within Interrupt Router. This ensures interrupt router
DT node need not assume any interrupt parent type.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-5-lokeshvutla@ti.com

Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt

@@ -44,15 +44,17 @@ Required Properties:
 			4: If intr supports level triggered interrupts.
 - interrupt-controller:	Identifies the node as an interrupt controller
 - #interrupt-cells:	Specifies the number of cells needed to encode an
-			interrupt source. The value should be 2.
-			First cell should contain the TISCI device ID of source
-			Second cell should contain the interrupt source offset
-			within the device.
+			interrupt source. The value should be 1.
+			First cell should contain interrupt router input number
+			as specified by hardware.
 - ti,sci:		Phandle to TI-SCI compatible System controller node.
-- ti,sci-dst-id:	TISCI device ID of the destination IRQ controller.
-- ti,sci-rm-range-girq:	Array of TISCI subtype ids representing the host irqs
-			assigned to this interrupt router. Each subtype id
-			corresponds to a range of host irqs.
+- ti,sci-dev-id:	TISCI device id of interrupt controller.
+- ti,interrupt-ranges:	Set of triplets containing ranges that convert
+			the INTR output interrupt numbers to parent's
+			interrupt number. Each triplet has following entries:
+			- First entry specifies the base for intr output irq
+			- Second entry specifies the base for parent irqs
+			- Third entry specifies the limit
 
 For more details on TISCI IRQ resource management refer:
 https://downloads.ti.com/tisci/esd/latest/2_tisci_msgs/rm/rm_irq.html
@@ -62,21 +64,20 @@ Example:
 The following example demonstrates both interrupt router node and the consumer
 node(main gpio) on the AM654 SoC:
 
-main_intr: interrupt-controller0 {
+main_gpio_intr: interrupt-controller0 {
 	compatible = "ti,sci-intr";
 	ti,intr-trigger-type = <1>;
 	interrupt-controller;
 	interrupt-parent = <&gic500>;
-	#interrupt-cells = <2>;
+	#interrupt-cells = <1>;
 	ti,sci = <&dmsc>;
-	ti,sci-dst-id = <56>;
-	ti,sci-rm-range-girq = <0x1>;
+	ti,sci-dev-id = <131>;
+	ti,interrupt-ranges = <0 360 32>;
 };
 
 main_gpio0: gpio@600000 {
 	...
-	interrupt-parent = <&main_intr>;
-	interrupts = <57 256>, <57 257>, <57 258>,
-		     <57 259>, <57 260>, <57 261>;
+	interrupt-parent = <&main_gpio_intr>;
+	interrupts = <192>, <193>, <194>, <195>, <196>, <197>;
 	...
 };