OMAPDSS: convert pixel clock to common videomode style

omapdss has its own video-timings struct, but we want to move the common
videomode.

The first step is to change the omapdss's pixelclock unit from kHz to
Hz. Also, omapdss uses "pixel_clock" field name, whereas the common
videomode uses "pixelclock" field name. This patch changes the field
name also, as that makes it easy to spot any non-converted pixel_clock
uses.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 1eb9aa6..24f3a57 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -343,8 +343,8 @@
 	u16 x_res;
 	/* Unit: pixels */
 	u16 y_res;
-	/* Unit: KHz */
-	u32 pixel_clock;
+	/* Unit: Hz */
+	u32 pixelclock;
 	/* Unit: pixel clocks */
 	u16 hsw;	/* Horizontal synchronization pulse width */
 	/* Unit: pixel clocks */