OMAPDSS: Remove passive matrix LCD support (part 4)

Remove configuration of Ac-bias pins

Ac-bias pins need to be configured only for passive matrix displays. Remove
acbi and acb fields in omap_dss_device and their configuration in panel
drivers. Don't program these fields in DISP_POL_FREQo register any more.

The panel driver for sharp-ls037v7dw01, and the panel config for
Innolux AT070TN8 in generic dpi panel driver set acb to a non zero value. This
is most likely carried over from the old omapfb driver which supported passive
matrix displays.

Cc: Thomas Weber <weber@corscience.de>
Signed-off-by: Archit Taneja <archit@ti.com>

drivers/video/omap2/dss/dpi.c

@@ -131,8 +131,7 @@ static int dpi_set_mode(struct omap_dss_device *dssdev)
 	unsigned long pck;
 	int r = 0;
 
-	dispc_mgr_set_pol_freq(dssdev->manager->id, dssdev->panel.config,
-			dssdev->panel.acbi, dssdev->panel.acb);
+	dispc_mgr_set_pol_freq(dssdev->manager->id, dssdev->panel.config);
 
 	if (dpi_use_dsi_pll(dssdev))
 		r = dpi_set_dsi_clk(dssdev, t->pixel_clock * 1000, &fck,