dt-bindings: arm: Move i.MX8MM Cloos PHG Board to TQM entry

The i.MX8MM Cloos PHG Board is based on TQ-Systems GmbH i.MX8MM TQMa8MQML SOM,
which results in compatible string in the form:
"vendor,custom-board", "tqm,som", "fsl,soc"
Move the binding entry so this triplet can be matched on.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>