freedreno: fix memory leak
freedreno: fix memory leak

Otherwise blitter would still hold a ref to, for example, sampler-
views.

To reproduce:

   glmark2 -b desktop:duration=2 --run-forever

Fixes: a8e6734 ("freedreno: support for using generic clear path")
Cc: "13.0 17.0" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Signed-off-by: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler