dt-bindings: remoteproc: Add Qualcomm PIL info binding

Add a devicetree binding for the Qualcomm peripheral image loader
relocation information region found in the IMEM.
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200622191942.255460-2-bjorn.andersson@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Documentation/devicetree/bindings/remoteproc/qcom,pil-info.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/remoteproc/qcom,pil-info.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm peripheral image loader relocation info binding
+
+maintainers:
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+description:
+  The Qualcomm peripheral image loader relocation memory region, in IMEM, is
+  used for communicating remoteproc relocation information to post mortem
+  debugging tools.
+
+properties:
+  compatible:
+    const: qcom,pil-reloc-info
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    imem@146bf000 {
+      compatible = "syscon", "simple-mfd";
+      reg = <0x146bf000 0x1000>;
+
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      ranges = <0 0x146bf000 0x1000>;
+
+      pil-reloc@94c {
+        compatible = "qcom,pil-reloc-info";
+        reg = <0x94c 0xc8>;
+      };
+    };
+...