arm64: dts: qcom: kaanapali-mtp: Add PMIC support

arm64: dts: qcom: kaanapali-mtp: Add PMIC support

Include PMIC files used on Kaanapali MTP boards. Add configurations for
keys (volume up and volume down), RGB LEDs and flash LEDs.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Shawn Guo <shengchao.guo@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260322-knp-pmic-dt-v1-2-70bc40ea4428@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>