arm64: dts: qcom: sc7280: Fix CPU nodes compatible string

'arm,kryo' is not documented and is not an Arm Ltd thing either as that
is Qualcomm branding. The correct compatible is 'qcom,kryo'.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221207211327.2848665-1-robh@kernel.org