snow: Fix a typo in devicetree.cb that was breaking the snow build.

A typo in a recent change broke the snow build.

BUG=None
TEST=Built successfully for snow.
BRANCH=None

Change-Id: I93074e68eb3d21510d974fd8e9c63b3947285afd
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/171014
Reviewed-by: Ronald Minnich <rminnich@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
diff --git a/src/mainboard/google/snow/devicetree.cb b/src/mainboard/google/snow/devicetree.cb
index c49ccc0..e6ce49d 100644
--- a/src/mainboard/google/snow/devicetree.cb
+++ b/src/mainboard/google/snow/devicetree.cb
@@ -21,7 +21,7 @@
 	device cpu_cluster 0 on end
 	register "xres" = "1366"
 	register "yres" = "768"
-	register "framebuffer_pits_per_pixel" = "16"
+	register "framebuffer_bits_per_pixel" = "16"
 	# complex magic timing!
 	register "clkval_f" = "2"
 	register "upper_margin" = "14"