arm:samsung:trats:fix: Restore proper orientation of TRATS's LCD panel

Before setting: mipi_lcd_device.reverse_panel = 1, the Trats's LCD panel
was flipped by 180 degrees.

The flip was caused by following change:
Exynos: Change get_timer() to work correctly
SHA1: 3d00c0cb96

This commit fixed udelay(), which is necessary (due to HW LCD controller
oddity) for mipi-dsi correct operation. As a result the display orientation
has been switched.

As a follow up, the hwrevision() function has been removed, since it was
used only in this particular place.

Test HW: Trats Exynos4210 rev 0.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Acked-by: Minkyu Kang <mk7.kang@samsung.com>

board/samsung/trats/trats.c

@@ -58,12 +58,6 @@ u32 get_board_rev(void)
 #endif
 
 static void check_hw_revision(void);
-
-static int hwrevision(int rev)
-{
-	return (board_rev & 0xf) == rev;
-}
-
 struct s3c_plat_otg_data s5pc210_otg_data;
 
 int board_init(void)
@@ -773,9 +767,7 @@ void init_panel_info(vidinfo_t *vid)
 #ifdef CONFIG_TIZEN
 	get_tizen_logo_info(vid);
 #endif
-
-	if (hwrevision(2))
-		mipi_lcd_device.reverse_panel = 1;
+	mipi_lcd_device.reverse_panel = 1;
 
 	strcpy(s6e8ax0_platform_data.lcd_panel_name, mipi_lcd_device.name);
 	s6e8ax0_platform_data.lcd_power = lcd_power;