dt-bindings: remoteproc: qcom,sc7280-wpss-pil: Fix qcom,halt-regs definition

Set the 'items' correctly for the qcom,halt-regs property and update the
description to match what it should be.

Signed-off-by: Luca Weiss <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

Documentation/devicetree/bindings/remoteproc/qcom,sc7280-wpss-pil.yaml

···
     $ref: /schemas/types.yaml#/definitions/phandle-array
     description:
       Phandle reference to a syscon representing TCSR followed by the
-      three offsets within syscon for q6, modem and nc halt registers.
+      offset within syscon for q6 halt register.
+    items:
+      - items:
+          - description: phandle to TCSR syscon region
+          - description: offset to the Q6 halt register
 
   qcom,qmp:
     $ref: /schemas/types.yaml#/definitions/phandle