common/lcd_console: introduce display/framebuffer rotation

Sometimes, for example if the display is mounted in portrait mode or even if it
is mounted landscape but rotated by 180 degrees, we need to rotate our content
of the display respectively the framebuffer, so that user can read the messages
which are printed out.

For this we introduce the feature called "CONFIG_LCD_ROTATION", this may be
defined in the board-configuration if needed. After this the lcd_console will
be initialized with a given rotation from "vl_rot" out of "vidinfo_t" which is
provided by the board specific code.

If CONFIG_LCD_ROTATION is not defined, the console will be initialized with
0 degrees rotation.

Signed-off-by: Hannes Petermaier <hannes.petermaier@br-automation.com>
Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>
Acked-by: Nikita Kiryanov <nikita@compulab.co.il>
[agust: fixed 'struct vidinfo' has no member named 'vl_rot' errors]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/include/exynos_lcd.h b/include/exynos_lcd.h
index cf389da..3969a6a 100644
--- a/include/exynos_lcd.h
+++ b/include/exynos_lcd.h
@@ -25,6 +25,7 @@
 typedef struct vidinfo {
 	ushort vl_col;		/* Number of columns (i.e. 640) */
 	ushort vl_row;		/* Number of rows (i.e. 480) */
+	ushort vl_rot;		/* Rotation of Display (0, 1, 2, 3) */
 	ushort vl_width;	/* Width of display area in millimeters */
 	ushort vl_height;	/* Height of display area in millimeters */