remove some unused config file stuff

Clean out a bit of left-over cruft.

Signed-off-by: Rob Clark <robdclark@gmail.com>
pixmap: remove some more cruft

Remove couple unused fxns.  And also, 2d core doesn't seem to need
special handling for 16bpp, so get rid of msm_pixmap_get_pitch() hack
too.

Signed-off-by: Rob Clark <robdclark@gmail.com>