OMAP: DSS2: Add FEAT_DSI_REVERSE_TXCLKESC

OMAP3430 has RESETDONETXCLKESCx bits in the order following bitnumber
order for lanes 0, 1, 2: 28, 27, 26. OMAP3630 and later have them in
saner order: 24, 25, 26 (and 27, 28 for OMAP4).

This patch adds a dss_feature that can be used to differentiate between
those two orders of RESETDONETXCLKESCx bits.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
index 7da798a..f4a92cd 100644
--- a/drivers/video/omap2/dss/dss_features.c
+++ b/drivers/video/omap2/dss/dss_features.c
@@ -253,7 +253,7 @@
 		FEAT_LCDENABLESIGNAL | FEAT_PCKFREEENABLE |
 		FEAT_FUNCGATED | FEAT_ROWREPEATENABLE |
 		FEAT_LINEBUFFERSPLIT | FEAT_RESIZECONF |
-		FEAT_DSI_PLL_FREQSEL,
+		FEAT_DSI_PLL_FREQSEL | FEAT_DSI_REVERSE_TXCLKESC,
 
 	.num_mgrs = 2,
 	.num_ovls = 3,