dt-bindings: arm: qcom: drop the IPQ board types

IPQ bootloaders do not need these information to select the
the DTB blob. So dropping the board names from board section.

Signed-off-by: Sridharan S N <quic_sridsn@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230927093130.4098385-1-quic_sridsn@quicinc.com


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