dt-bindings: arm: qcom: drop the superfluous device compatibility schema

dt-bindings: arm: qcom: drop the superfluous device compatibility schema

The idea impressed in the commit b32e592d3c28 ("devicetree: bindings:
Document qcom board compatible format") never got actually adopted. As
can be seen from the existing board DT files, no device actually used
the PMIC / foundry / version parts of the compatible string. Drop this
compatibility string description to avoid possible confusion and keep
just the generic terms and the SoC list.

Fixes: b32e592d3c28 ("devicetree: bindings: Document qcom board compatible format")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20240204-qcom-drop-compat-v1-1-69d6cd92aa0e@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>