dt-bindings: arm: qcom: Add Xiaomi Pad 6 (xiaomi-pipa)

Add a compatible for Xiaomi Pad 6.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Luka Panio <lukapanio@gmail.com>
Link: https://lore.kernel.org/r/20231125220315.118922-1-lukapanio@gmail.com


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