phy: qcom: qmp-combo: drop similar functions

The functions qmp_v5_configure_dp_phy() and qmp_v6_configure_dp_phy()
are now copies of qmp_v4_configure_dp_phy(). Drop them and use the v4
function in all the cases.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230621153317.1025914-6-dmitry.baryshkov@linaro.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>