arm64: dts: qcom: sc8280xp-crd: add support for volume-up key

arm64: dts: qcom: sc8280xp-crd: add support for volume-up key

Add support for the keypad volume-up key on the debug extension board.

This is useful to have when testing PMIC interrupt handling, and the key
can also be used to wake up from deep suspend states (CX shutdown).

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250307171036.7276-1-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>