arm64: dts: qcom: sm8250-edo: Rectify gpio-keys

Set up the corresponding GPIOs properly and add the leftover hardware
buttons to mark this piece of the puzzle complete.

Fixes: 46e14907 ("arm64: dts: qcom: sm8250-edo: Add hardware keys")
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230614-topic-edo_pinsgpiopmic-v2-4-6f90bba54c53@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>