phy: qcom-qmp: Add v6 DP register offsets

The new SM8550 SoC bumps up the HW version of QMP phy to v6.
Add the new DP specific offsets in the generic qmp header file.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230208183421.2874423-6-abel.vesa@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>