video: stm32: lvds: remove polarities settings

The LVDS bridge controls the polarities of the signal.
To avoid permutation of polarities, LVDS bridge should not control them.
This task is performed exclusively by the LTDC.

Change-Id: Id593447397c8bb4fcdf5aa0f860f4357efc286c8
Signed-off-by: Yannick Fertre <yannick.fertre@foss.st.com>
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/u-boot/+/530957
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>
Reviewed-by: Patrice CHOTARD <patrice.chotard@foss.st.com>
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>

Author: Yannick Fertre

drivers/video/stm32/stm32_lvds.c

@@ -410,16 +410,6 @@ static int stm32_lvds_enable(struct udevice *dev,
 	if (lvds->link_type & LVDS_SINGLE_LINK_SECONDARY)
 		lvds_cdl2cr = CDL2CR_4DL_DEFAULT;
 
-	/* Set signal polarity */
-	if (timings->flags & DISPLAY_FLAGS_DE_LOW)
-		lvds_cr |= CR_DEPOL;
-
-	if (timings->flags & DISPLAY_FLAGS_HSYNC_LOW)
-		lvds_cr |= CR_HSPOL;
-
-	if (timings->flags & DISPLAY_FLAGS_VSYNC_LOW)
-		lvds_cr |= CR_VSPOL;
-
 	/* Set link phase */
 	switch (lvds->link_type) {
 	case LVDS_DUAL_LINK_EVEN_ODD_PIXELS: /* LKPHA = 0 */