This directory contains vendor-supplied drivers that may be used to override
the in-tree version of the same driver.  This is done (as opposed to just
patching the in-tree code directly) to prevent huge merge headaches when
rebasing onto newer kernels, pulling upstream patch sets, etc.

The top-level Makefile is patched to include this directory in the build, and
the appropriate kernel config parameters are unset to disable the in-tree
version of each driver.
