drivers/video/am335x-fb: Fix bits for LCD_PALMODE_RAWDATA definition

According to the TRM you have to set bits [21:20] to 0b10 for RAW mode, so
(0x10 << 20) is obviously wrong here.

Signed-off-by: Martin Pietryka <martin.pietryka@chello.at>

drivers/video/am335x-fb.c

@@ -55,7 +55,7 @@
 /* LCD Raster Ctrl Register */
 #define LCD_TFT_24BPP_MODE			(1 << 25)
 #define LCD_TFT_24BPP_UNPACK			(1 << 26)
-#define LCD_PALMODE_RAWDATA			(0x10 << 20)
+#define LCD_PALMODE_RAWDATA			(0x02 << 20)
 #define LCD_TFT_MODE				(0x01 << 7)
 #define LCD_RASTER_ENABLE			(0x01 << 0)