arm64: dts: qcom: sdm670: add qfprom node

Some hardware quirks and capabilities can be determined by reading the
fuse-programmable read-only memory. Add the QFPROM node so consumers
know if they need to do anything extra to support the hardware.

Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221206231729.164453-2-mailingradian@gmail.com