OMAPDSS: Remove passive matrix LCD support (part 3)

Remove omap_lcd_display_type enum

The enum omap_lcd_display_type is used to configure the lcd display type in
DISPC. Remove this enum and always set display type to TFT by creating function
dss_mgr_set_lcd_type_tft().

Signed-off-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 6e25624..c017d22 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -2490,26 +2490,9 @@
 }
 
 
-void dispc_mgr_set_lcd_display_type(enum omap_channel channel,
-		enum omap_lcd_display_type type)
+void dispc_mgr_set_lcd_type_tft(enum omap_channel channel)
 {
-	int mode;
-
-	switch (type) {
-	case OMAP_DSS_LCD_DISPLAY_STN:
-		mode = 0;
-		break;
-
-	case OMAP_DSS_LCD_DISPLAY_TFT:
-		mode = 1;
-		break;
-
-	default:
-		BUG();
-		return;
-	}
-
-	mgr_fld_write(channel, DISPC_MGR_FLD_STNTFT, mode);
+	mgr_fld_write(channel, DISPC_MGR_FLD_STNTFT, 1);
 }
 
 void dispc_set_loadmode(enum omap_dss_load_mode mode)