dt-bindings: remoteproc: qcom,msm8916-mss-pil: Add MSM8226

Add support for external power block headswitch (BHS) registers.
Similarly to MSM8974 also MSM8226 has the mx voltage rail exposed as
regulator and only cx voltage rail as power domain.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luca Weiss <luca@lucaweiss.eu>
Link: https://lore.kernel.org/r/20250217-msm8226-modem-v5-2-2bc74b80e0ae@lucaweiss.eu


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