cpuidle: qcom: Add SPM register data for MSM8226

Add MSM8226 register data to SPM AVS Wrapper 2 (SAW2) power controller
driver.

Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bartosz Dudziak <bartosz.dudziak@snejp.pl>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210612205335.9730-3-bartosz.dudziak@snejp.pl