arm64: dts: qcom: x1-hp-x14: Add support for X1P42100 HP Omnibook X14

arm64: dts: qcom: x1-hp-x14: Add support for X1P42100 HP Omnibook X14

These laptops are the same as the already known 14-fe0xxx models, but
with a Purwa SoC, SKU number 14-fe1xxx. [1]

The supported features are the same as for the original Omnibook X14:

- Keyboard (no function keys though)
- Display
- PWM brightness control
- Touchpad
- Touchscreen
- PCIe ports (pcie4, pcie6a)
- USB type-c, type-a
- WCN6855 Wifi-6E
- WCN6855 Bluetooth
- ADSP and CDSP
- X1 GPU
- GPIO Keys (Lid switch)
- Audio definition (works via USB and with internal speakers)

[1]: https://www.hp.com/us-en/shop/pdp/hp-omnibook-x-laptop-next-gen-ai-pc-14-fe100-14-a4nd1av-1#techSpecs

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
Link: https://lore.kernel.org/r/20250915-hp-x14-x1p-v9-3-fa457ca30ffe@oldschoolsolutions.biz
Signed-off-by: Bjorn Andersson <andersson@kernel.org>