i965: Drop brwBindProgram driver hook.

i965: Drop brwBindProgram driver hook.

This function flagged BRW_NEW_*_PROGRAM

When ctx->{Vertex,Geometry,Fragment}Program._Current changes, core Mesa
calls the BindProgram driver hook, which flagged BRW_NEW_*_PROGRAM.

However, brw_upload_state also checks for that changing, sets the same
flags, and also updates brw->fragment_program and so on.  So, this looks
to be entirely redundant.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>