phy: qcom-qmp-pcie-msm8996: clean up power-down handling

This driver uses v2 registers only so drop the unnecessary
POWER_DOWN_CONTROL override.

Note that this register is already hard-coded when powering on the PHY.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221017065013.19647-7-johan+linaro@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c

@@ -91,7 +91,6 @@ enum qphy_reg_layout {
 	QPHY_SW_RESET,
 	QPHY_START_CTRL,
 	QPHY_PCS_STATUS,
-	QPHY_PCS_POWER_DOWN_CONTROL,
 	/* Keep last to ensure regs_layout arrays are properly initialized */
 	QPHY_LAYOUT_SIZE
 };
@@ -591,13 +590,8 @@ static int qmp_pcie_msm8996_power_off(struct phy *phy)
 	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 	/* Put PHY into POWER DOWN state: active low */
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	} else {
-		qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
-	}
+	qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
+			cfg->pwrdn_ctrl);
 
 	return 0;
 }