dragon: Update prebuilt kernel to fb4221a43911ef89ecda495c65d65945e98d9678

Build: trybot-smaug-paladin/R48-7566.1.0-b574

Changes include:
* fb4221a drm/tegra: Correct bpp for yuv in calc_disp_param
* 2089bfb CHROMIUM: drm/tegra: Fix NULL dereference in LA code

Change-Id: I2b5241062374e3a6f0225a1b348055cee7f63435
diff --git a/Image.fit b/Image.fit
index 606f036..121251a 100644
--- a/Image.fit
+++ b/Image.fit
Binary files differ