svga: simplify/fix 1D/2D array resource copies
svga: simplify/fix 1D/2D array resource copies

Fixes the one of the piglit arb_copy_image-targets tests for 1D arrays.
Previously, we were applying the 1D array z/face adjustment twice.

Also simplify the copy_region_vgpu10() function.  It never has to copy
multiple array layers/slices.  The Mesa code for glCopyImageSubData does
the loop over slices/faces.

Reviewed-by: Charmaine Lee <67ce69700661ea856134ddb10419a330e5f037d7@vmware.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler