phy: qcom: qmp-usbc: Add DP-related fields for USB/DP switchable PHY

phy: qcom: qmp-usbc: Add DP-related fields for USB/DP switchable PHY

Extend qmp_usbc_offsets and qmp_phy_cfg with DP-specific fields,
including register offsets, init tables, and callback hooks. Also
update qmp_usbc struct to track DP-related resources and state.
This enables support for USB/DP switchable Type-C PHYs that operate
in either mode.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Xiangxu Yin <xiangxu.yin@oss.qualcomm.com>
Link: https://patch.msgid.link/20251215-add-displayport-support-for-qcs615-platform-v8-3-cbc72c88a44e@oss.qualcomm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>