intel/blorp: Simplify depth/stencil config
intel/blorp: Simplify depth/stencil config

The newly reworked depth/stencil config code can properly handle having
depth, stencil, both, or neither.  We no longer need to predicate it on
having depth or stencil.

Signed-off-by: Jason Ekstrand <68c46a606457643eab92053c1c05574abb26f861@jlekstrand.net>
Reviewed-by: Topi Pohjolainen <749697f19798b7f640b17221fd283b903825f071@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler