dt-bindings: remoteproc: qcom,sdm845-adsp-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 <luca@z3ntu.xyz>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20240407-qcom-halt-regs-fixup-v1-3-a0ea4e2c178e@z3ntu.xyz


Signed-off-by: Bjorn Andersson <andersson@kernel.org>