bcm2835 video: Map frame buffer as 32bpp

To enable working efifb support, let's map the frame buffer as 32bpp
instead of 16bpp.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
diff --git a/include/configs/rpi.h b/include/configs/rpi.h
index fa959ef..4406366 100644
--- a/include/configs/rpi.h
+++ b/include/configs/rpi.h
@@ -71,7 +71,7 @@
 #define CONFIG_BCM2835_GPIO
 /* LCD */
 #define CONFIG_LCD_DT_SIMPLEFB
-#define LCD_BPP				LCD_COLOR16
+#define LCD_BPP				LCD_COLOR32
 /*
  * Prevent allocation of RAM for FB; the real FB address is queried
  * dynamically from the VideoCore co-processor, and comes from RAM