ufs: host: ufs-qcom: Clear qunipro_g4_sel for HW version major 5

On SM8550, depending on the Qunipro, we can run with G5 or G4.
For now, when the major version is 5 or above, we go with G5.
Therefore, we need to specifically tell UFS HC that.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>