soc: qcom: rpmpd: Add MSM8226 support

Add the power domains preset in MSM8226.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220220223004.507739-2-luca@z3ntu.xyz