dt-bindings: sram: qcom,imem: Add minidump-sram pattern property

The qcom,imem binding describes a single word in always-on SRAM shared
between the operating system (OS) and boot firmware. Before DDR is
initialized on the warm reset following a crash, firmware reads this
word to decide where to deliver the minidump, and the OS is expected to
select one of the destinations: either USB upload to a host PC or save
to on-device storage. If nothing is selected by the OS, USB is the
default.

Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20260624190830.3131112-3-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Documentation/devicetree/bindings/sram/qcom,imem.yaml

@@ -67,6 +67,22 @@ properties:
     $ref: /schemas/power/reset/syscon-reboot-mode.yaml#
 
 patternProperties:
+  "^minidump-sram@[0-9a-f]+$":
+    type: object
+    description:
+      A word in always-on SRAM shared between the kernel and boot firmware.
+      Before DDR is initialised on the warm reset following a crash, firmware
+      reads this word to decide where to deliver the minidump (USB or storage).
+
+    properties:
+      reg:
+        maxItems: 1
+
+    required:
+      - reg
+
+    additionalProperties: false
+
   "^modem-tables@[0-9a-f]+$":
     type: object
     description: