phy: qcom-qmp: Initialize another pointer to NULL

This probe function is too complicated and should be refactored. For now
let's just set this variable to NULL and keep the static analysis tools
happy.

Fixes: 52e013d0 ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20201026205942.2861828-1-swboyd@chromium.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

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

@@ -3926,7 +3926,7 @@ static int qcom_qmp_phy_probe(struct platform_device *pdev)
 	struct phy_provider *phy_provider;
 	void __iomem *serdes;
 	void __iomem *usb_serdes;
-	void __iomem *dp_serdes;
+	void __iomem *dp_serdes = NULL;
 	const struct qmp_phy_combo_cfg *combo_cfg = NULL;
 	const struct qmp_phy_cfg *cfg = NULL;
 	const struct qmp_phy_cfg *usb_cfg = NULL;