phy: qualcomm: qmp: Add missing struct documentation

dp-* members were added to qmp_phy_combo_cfg but documentation was
missed, so add that.

drivers/phy/qualcomm/phy-qcom-qmp.c:2995: warning: Function parameter or member 'dp_aux_cfg' not described in 'qmp_phy'
drivers/phy/qualcomm/phy-qcom-qmp.c:2995: warning: Function parameter or member 'dp_opts' not described in 'qmp_phy'
drivers/phy/qualcomm/phy-qcom-qmp.c:2995: warning: Function parameter or member 'dp_clks' not described in 'qmp_phy'

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211116103951.34482-3-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-qmp.c

@@ -2973,6 +2973,9 @@ struct qmp_phy_combo_cfg {
  * @qmp: QMP phy to which this lane belongs
  * @lane_rst: lane's reset controller
  * @mode: current PHY mode
+ * @dp_aux_cfg: Display port aux config
+ * @dp_opts: Display port optional config
+ * @dp_clks: Display port clocks
  */
 struct qmp_phy {
 	struct phy *phy;