phy: exynos5-usbdrd: fix setting LINKSYSTEM_FLADJ on exynos7870

The code here is trying to set the FLADJ field to 0x20, so it should
clear any previous value in that field before or'ing-in the new value.

Fixes: 588d5d2 ("phy: exynos5-usbdrd: add exynos7870 USBDRD support")
Signed-off-by: André Draszik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: andred

drivers/phy/samsung/phy-exynos5-usbdrd.c

@@ -1186,6 +1186,7 @@ static void exynos7870_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
 	 * See xHCI 1.0 spec, 5.2.4
 	 */
 	reg |= LINKSYSTEM_XHCI_VERSION_CONTROL;
+	reg &= ~LINKSYSTEM_FLADJ;
 	reg |= FIELD_PREP_CONST(LINKSYSTEM_FLADJ, 0x20);
 	/* Set VBUSVALID signal as the VBUS pad is not used */
 	reg |= LINKSYSTEM_FORCE_BVALID;