st/va: fix post process dirty area handling
st/va: fix post process dirty area handling

The dirty area in this call isn't related to the screen at all.

v2: set clear dirty area to false as well

Signed-off-by: Christian König <c7ea837d7a46effe4232b086213468b8b31643bf@amd.com>
Reviewed-by: Julien Isorce <2904e845d63d102574cbb95a4bcdefac0a5d7af0@samsung.com>
Reviewed-by: Leo Liu <2cc5244297c0b82e7ea531cc4a868153602775b7@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler