dts: sdm845: import supporting dtsi files

Import the PM8998 and PMI8998 PMIC DTSI files from Linux as well
as the common audio codec in preperation for replacing board DTS files
with upstream.

Taken from kernel tag v6.7

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>