dt-bindings: remoteproc: st,stm32-rproc: Fix phandle-array parameters description

Replace the FIXME by appropriate description.

Fixes: 39bd2b6 ("dt-bindings: Improve phandle-array schemas")
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220505113639.1344281-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Author: arnopo

Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml

@@ -43,8 +43,8 @@ properties:
     items:
       - items:
           - description: Phandle of syscon block
-          - description: FIXME
-          - description: FIXME
+          - description: The offset of the trust zone setting register
+          - description: The field mask of the trust zone state
 
   interrupts:
     description: Should contain the WWDG1 watchdog reset interrupt
@@ -101,8 +101,8 @@ properties:
     items:
       - items:
           - description: Phandle of syscon block
-          - description: FIXME
-          - description: FIXME
+          - description: The offset of the power setting register
+          - description: The field mask of the PDDS selection
 
   st,syscfg-m4-state:
     $ref: "/schemas/types.yaml#/definitions/phandle-array"
@@ -111,8 +111,8 @@ properties:
     items:
       - items:
           - description: Phandle of syscon block with the tamp register
-          - description: FIXME
-          - description: FIXME
+          - description: The offset of the tamp register
+          - description: The field mask of the Cortex-M4 state
 
   st,syscfg-rsc-tbl:
     $ref: "/schemas/types.yaml#/definitions/phandle-array"
@@ -122,8 +122,8 @@ properties:
     items:
       - items:
           - description: Phandle of syscon block with the tamp register
-          - description: FIXME
-          - description: FIXME
+          - description: The offset of the tamp register
+          - description: The field mask of the Cortex-M4 resource table address
 
   st,auto-boot:
     $ref: /schemas/types.yaml#/definitions/flag