dt-bindings: interrupt-controller: Convert lsi,zevio-intc to DT schema

Convert the TI-NSPIRE interrupt controller binding to schema format. It's a straight-forward conversion of the typical interrupt controller.

'#interrupt-cells' was missing from the property list, but used in the example, so add it.

---
 .../interrupt-controller/lsi,zevio-intc.txt   | 18 --------
 .../interrupt-controller/lsi,zevio-intc.yaml  | 43 +++++++++++++++++++
 2 files changed, 43 insertions(+), 18 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/lsi,zevio-intc.txt
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/lsi,zevio-intc.yaml

deleted file mode 100644
index aee38e7c13e7..000000000000
@@ -1,18 +0,0 @@
-TI-NSPIRE interrupt controller
-
-Required properties:
-- compatible: Compatible property value should be "lsi,zevio-intc".
-
-- reg: Physical base address of the controller and length of memory mapped
-	region.
-
-- interrupt-controller : Identifies the node as an interrupt controller
-
-Example:
-
-interrupt-controller {
-	compatible = "lsi,zevio-intc";
-	interrupt-controller;
-	reg = <0xDC000000 0x1000>;
-	#interrupt-cells = <1>;
-};

2.47.2