drivers: wifi: Remove unncessary zephyr_include_directories

Several wifi drivers add some form of zephyr_include_directories(.)
which isn't needed since the headers in the specific driver dir get
included via #include "foo.h".  So we can remove any uses of
zephyr_include_directories(.)

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
3 files changed