bcmdhd: Update to 1.88.16

Applied via patch this commit from the M7 kernel:

commit 976345c4ace203573dda0fbf700899b1235e1246
Author: Ethan Chen <intervigil@gmail.com>
Date:   Sun May 12 16:58:35 2013 -0700

    net: wireless bcmdhd: Update to version 1.88.16

    Code imported from google/android-3.4

    Change-Id: I81220d179e70c5c2724075928ffc8f635742fe17