dt-bindings: power: rpmpd: Add MSM8974 power domains

Add the compatibles and indexes for the rpmpd in MSM8974, both with the
standard PM8841+PM8941 PMICs but also devices found with PMA8084.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240210-msm8974-rpmpd-v2-1-595e2ff80ea1@z3ntu.xyz


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>