After the release of the ROM with first version of those drivers included, we are glad to announce that, as always, we opensourced this "4.0.4 drivers" as well as Broadcom did. Feel free to take them, and use it at your own, to build diferent ROMs, such as AOKP, Paranoid, AOSP... Or Jelly Bean . This are drivers source, you will need to cherry-pick them to your local repo:
Broadcom was nice, and they created a new HGL lib, which they open-sourced too, and give the name of libv3d, kind of a new HGL lib, which should complish all patches and BCM21553 requiriments, also opensourced on BroadcomCM.
- /brcm_usrlib also known as libv3d
You can also find original patch on Broadcom's page (4.0.1 patch) and the diff files I've made, which they will give you more clues on how to implement them on other sources
NOTE: School holidays since next Saturday, so I'll be out till then, so no more news till Saturday, although stay tuned on XDA :)