dt-bindings: sram: Document qcom,kaanapali-imem and its child node

dt-bindings: sram: Document qcom,kaanapali-imem and its child node

On Qualcomm Kaanapali platform, IMEM is a block of SRAM shared across
multiple IP blocks which can falk back to "mmio-sram". Documnent it and
its child node "qcom,pil-reloc-info" which is used for collecting
remoteproc ramdumps.

Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251123-knp-soc-binding-v4-1-42b349a66c59@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>