i965: Rename brw_wm_barycentric_interp_mode to brw_barycentric_mode.

i965: Rename brw_wm_barycentric_interp_mode to brw_barycentric_mode.

brw_wm_barycentric_interp_mode is wordy, brw_barycentric_mode is less
typing and suffers from fewer line wrapping problems.

The enum values themselves don't really benefit from "WM" in the name,
either.  Put "BARYCENTRIC" first instead of at the end and drop "WM".

Generated by:

for file in *.c *.cpp *.h; do sed -i \
   -e 's/brw_wm_barycentric_interp_mode/brw_barycentric_mode/g' \
   -e 's/BRW_WM_\([A-Z_]*\)_BARYCENTRIC/BRW_BARYCENTRIC_\1/g' \
   -e 's/BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT/BRW_BARYCENTRIC_MODE_COUNT/g' \
   $file;
done

with a few whitespace changes.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>