ARM: dts: msm: Include sdm845-pinctrl.dtsi for all SDM845 targets

Pincontrols are part of the SDM845 SoC and needed to be included in all
targets using SDM845 SoC. Include the sdm845-pinctrl.dtsi file in SoC
specific DTSI file, rather than each individual target specific DTSI file.

Change-Id: I85d20e5156f3c2a666071916e0f521c439218625
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>