radeonsi/gfx9: don't compare src_va w/ dst_va for CP_DMA_CLEAR
radeonsi/gfx9: don't compare src_va w/ dst_va for CP_DMA_CLEAR

src_va contains the clear value in this case.

Reviewed-by: Nicolai Hähnle <0d0be6cf5ad662651be2dc5dfd44aa2b09d4c1cc@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler