The speedbin value blown in the efuse is used to determine is used to
determine the voltage and frequency value for different IPs, including
GPU, CPUs... So it's really not a gpu specific information.

This patch simply renames 'gpu_speed_bin' node to 'speedbin'.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210527194455.782108-1-konrad.dybcio@somainline.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>