i965: Use enum color_logic_ops for blits

i965: Use enum color_logic_ops for blits

v2: sed --in-place -e 's/color_logic_ops/gl_logicop_mode/g' $(grep -lr
color_logic_ops src/) suggested by Brian.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com> [v1]