arm64: dts: qcom: sm8550: correct Iris corners for the MXC rail

arm64: dts: qcom: sm8550: correct Iris corners for the MXC rail

The corners of the MVS0 / MVS0C clocks on the MMCX rail don't always
match the PLL corners on the MXC rail. Correct the performance corners
for the MXC rail following the PLL documentation.

Fixes: 41661853ae8e ("arm64: dts: qcom: sm8550: add iris DT node")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260313-iris-fix-corners-v1-4-32a393c25dda@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>