vc4: Replace the FLUSH_ALL with FLUSH.
vc4: Replace the FLUSH_ALL with FLUSH.

We don't need to emit all of our current state at the end of each bin
list.  We're going to be smashing it all at the start of the next tile's
bin list, anyway.

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler